Among the most consumed teas in the world is green tea.
The drink, which has been part of the oriental tradition for centuries, recently gained more visibility and popularity for its properties and its actions in the body.
The benefits of green tea that have gained prominence are, above all, the diuretic, slimming, relaxing, stimulating and aesthetic functions.
However, there are some contraindications and possible side effects that should be noted.
Check out everything about green tea in the text below!
- 1 What is green tea?
- 2 A planta Camellia sinensis
- 3 Types: how to consume green tea?
- 4 What is each component used for?
- 5 Benefits of green tea
- 5.1 Helps burn fat
- 5.2 Promotes satiety
- 5.3 Antioxidant action
- 5.4 Speeds up metabolism
- 5.5 Reduces the risk of cardiovascular disease
- 5.6 Reduces cancer risks
- 5.7 Increases happiness
- 5.8 Improves mental capacity
- 5.9 Reduces cholesterol
- 5.10 Aids in digestion
- 5.11 Reduces the risk of Parkinson’s disease
- 5.12 Reduces blood pressure
- 5.13 Reduces the risk of heart attack and stroke
- 5.14 Works as a diuretic
- 5.15 Can reduce visceral fat
- 5.16 Can prevent type 2 diabetes
- 6 Green tea lose weight?
- 7 How much to consume?
- 8 How to make? The right way to prepare green tea
- 9 Recipes
- 10 Adverse effects
- 11 Contraindications: who should not take it?
- 12 Green tea and drug interactions
- 13 Green tea and aesthetics
- 14 Home treatments with green tea
- 15 Price and where to buy
- 16 The history of tea
- 17 Common questions
- 17.1 Can you have green tea at night?
- 17.2 What is the best time to drink green tea?
- 17.3 How much green tea per day?
- 17.4 How much caffeine is in green tea?
- 17.5 Can I make a single amount of tea to drink during the day?
- 17.6 How to store green tea?
- 17.7 Once ready, how to drink green tea?
- 17.8 Can you sweeten green tea?
- 17.9 Are sachet, powder and capsule teas all the same?
By letting a portion of Camellia sinensis infuse, you will get a relatively bitter, greenish-colored liquid: green tea.
The taste, which may be slightly unpleasant for most people, is outweighed by the benefits that the drink offers the body.
You have probably heard of green tea and its stimulating and diuretic properties. The drink has gained worldwide space, especially among people who seek to reduce measures.
But those who think that the product has only this function are mistaken, since the plant also has stimulating, antioxidant, anti-inflammatory, anti-hypertensive, anti-diabetic and anti-mutagenic properties.
White tea is made with new shoots and leaves, harvested before the flowers open (the quick harvest makes the plant not undergo a process called fermentation).
On the other hand, green tea is made with slightly more mature plants that undergo a slight fermentation (but still preserve high functional concentrations).
Already the black tea is what suffers most fermentation because the leaves take longer to be harvested, so it’s the one with the least amount of properties and nutrients.
You can find the product in bulk (loose leaves), in capsules, in sachets, in powder or in industrialized products (for example, mints or juices with green tea extract).
The properties of the plant tend to be the same in all cases, however the concentrations will vary widely.
In addition, depending on the purpose, the consumption of each product is more or less indicated – if the goal is just to drink something more natural, industrialized tea is ideal, but if you want to lose weight, the bulk plant is the best option.
Several studies link the daily consumption of green tea to benefits to the body and health, confirming that the body can benefit from the inclusion of the drink in the routine.
The plant belongs to the Theaceae family , grown in several regions, but native to forests in northern India and southern China.
Its structure is high, reaching up to 15 meters if frequent pruning is not done, with dark and glossy leaves and flowers with white petals that can appear alone or in pairs.
White, green, oolong and black teas are derived from it, which are distinguished by the type of cultivation, harvest and preparation.
The Camellia sinensis hibernates during the winter and in the spring, begins to cast shoots and leaves.
For plants grown in Brazil, the harvest starts in September and extends until April, for 8 months, according to the companies that cultivate the herb nationally.
The harvested leaves need to be subjected to rapid heating that deactivates the enzyme polyphenol oxidase (oxidizing enzyme) and prevents the plant from darkening and wilting (this is the ideal point for black tea).
There are two ways to prevent oxidation of the plant, which can be through roasting in an oven or by steaming (steaming).
Green tea goes through a process that then involves the following steps:
- Drying (where enzymes are inactivated);
- Rotation and new drying (for breaking and reducing the size of the leaves);
- Final drying.
The plant is rich in flavonoids, which are substances that pigment (give color) to vegetables and also protect them from oxidative action.
Due to this characteristic, Camellia sinensis has therapeutic properties that will vary according to the production process used, being considered a functional food .
It is important to remember that like any natural product, the characteristics can change according to the climate, the region of cultivation and also by the origin of the plant.
But, in general, green tea production processes preserve the flavonoid content high and give the drink higher levels of polyphenols and catechins than other teas (black and oolong, for example).
There are a variety of green tea presentations. In general, the best known and most commercialized are powder, sachet, capsule and herbal versions (sold in bulk or packaged).
But, in addition to these, the tea has other presentations according to the processing of the leaves. Learn more about each type:
The plant is the same, Camellia sinensis , but the process to reach your cup is different, as it involves industrialization steps.
It is one of the most practical versions to be prepared. However, the origin and material used in the bag can interfere with the result of the drink, even leaving the taste more bitter.
Soluble green tea is found in pharmacies and health food stores. It is very practical to prepare because it does not need an infusion, just add cold water.
The soluble product tends to taste more pleasant (really sweet), made to drink during the day and even as a substitute for juices.
It is important, however, to take care with the addition of sugars and preservatives.
Green tea in capsules tends to concentrate nutrients and thermogenic properties.
That is, it is more suitable for those who want to combine the product with diet and health, but find it difficult to ingest the drink daily.
Generally purchased in health food stores or pharmacies, herbs are processed in different ways, which give particular characteristics to each type.
In Brazil, generally, the most common are Sencha, Matchá and Banchá, but above all in Japan the drink has a wide presentation and are classified as follows:
Green tea sencha
The leaves are chopped up to a very thin thickness, almost like a needle. Sencha is the most consumed in Japan and considered by many to be the most flavorful, with moderate bitterness and a slightly sweet touch.
Gyokuro green tea
The type is quite thin as well, but the coloring of the dried herb is a little lighter and more vivid than the sancha (which has a dark green with black sheen).
The taste is less bitter, with more presence of the sweet touch of the plant.
Matcha green tea
Matcha green tea is processed into powder and its color is bright green and intense.
To prepare it, just add hot water, it is not necessary to make the infusion. It is easier to mix it in recipes, pastes and cosmetics because it homogenizes quickly.
It is easily found in health food stores and has thicker and larger leaves. The taste tends to be considerably more bitter.
The matcha has gained space among consumers because, when compared to bancha (herbs that need infusion), it offers much higher concentrations of its properties.
For example, the powder version has up to 137 times more antioxidants, in addition to higher values of vitamin E , B2, B6 and fiber.
Green tea bancha
Banchá takes a little longer to be harvested, so the oxidation process minimizes its bitter taste. The properties are also reduced, but they are still present.
Hojicha green tea
The hojicha type mixes the banchá leaves or sencha with stems. The herb goes through a process in which it is roasted to impart aroma to the product. Among the varieties of green tea, it has the least amount of caffeine.
In Japan, it is the type most consumed by children or people with a disease.
Genmaicha green tea
Banchá or sencha tea is mixed with roasted rice. In Japan, the drink is usually consumed between meals due to its light and balanced flavor.
In industrialized products, such as ready teas, candies and shakes, green tea tends to have less concentrated functional properties, but they are still present.
In general, it is the digestive and energetic functions that are most pronounced in these products and foods.
In cosmetics, green tea can be combined with formulation to provide revitalizing and antioxidant actions to skin and hair.
Green tea has several components such as water, protein, carbohydrate and mineral salts. In addition, the product contains caffeine, which may have significant amounts of fluoride and vitamins .
Learn a little more about the action of the main components found in the plant:
Vitamin A has anti-inflammatory properties, helping to strengthen the immune system. Generally associated with vision health, there are other tissues that benefit greatly from the action of the nutrient, such as trachea, skin and heart.
Complex B vitamins
Green tea contains vitamins B1, B2 and B3. The amounts of B1 and B2 are more concentrated in green tea than in black tea (about 350mcg of B1 and 1400mcg of B2 every 100g).
Vitamin B1 participates in skin functions, such as healing and collagen production, in addition to acting on energy metabolism and the nervous system.
Vitamin B2 acts as a cellular antioxidant, in addition to participating in the formation of tissues.
Niacin (B3) acts in the regulation of blood sugar, in the metabolism of cholesterol and also participates in cellular metabolism.
Vitamin C has several functions in the body, such as participation in the synthesis of carnitine, in the reduction of cholesterol, in the aid of the elimination of toxins from the liver, in the strengthening of the immune system, in the participation of iron absorption and in the production of collagen.
Fluoride can have positive effects on bone remineralization, that is, the substance prevents weakening of the tissue.
Studies that evaluated the presence of the substance in teas indicate that there may be benefits even for oral health , as soon as consumption can reduce the weakening of the dental arch, minimize the appearance of cavities and maintain tooth enamel.
Rutin is often mistakenly called vitamin P (because, in fact, vitamin P is a combination of 3 elements: rutin, citrine and hesperidin). Present in green tea, the substance has antioxidant and anti-inflammatory properties.
It participates in the production of collagen, can assist in the circulatory system, in addition to improving the action of vitamin C.
The nutrient decreases the action of free radicals (which cause aging), can help control cholesterol and hormonal rates.
The best-known actions of the vitamin possibly refer to the health of the skin and hair. This is because the nutrient promotes more elasticity and resistance of tissues, reducing damage due to age and external factors (such as pollution, exposure to the sun or injuries).
The vitamin K acts directly on bone health and heart, as part of the strengthening of the bone tissue and aids in blood clotting. Brain functions can also benefit from the consumption of the nutrient, as anti-inflammatory actions reduce the oxidation of brain cells due to free radicals.
The amount of caffeine contained in green tea can vary between 2% and 5%, being quite high compared to other products and teas. Therefore, drink intake should be moderate, especially in people with anxiety and agitation.
As caffeine is a physical and mental stimulant, it can promote a diuretic action and can assist in strengthening the heart in healthy people.
For practitioners of physical activities, the substance shows good results, as it improves physical endurance during activity.
Green tea leaves have approximately 6% mineral salts, including potassium, folic acid , manganese, copper, zinc and nickel. These elements participate in various functions in the body, helping to balance and maintain health.
Also called tannin, the substance is present in several vegetable products and has an astringent action, being responsible for that drier flavor of tea. The component inhibits the action of free radicals and prevents premature aging.
Catechins can play antioxidant, anti-cancer and cholesterol-lowering functions. In addition, it can inhibit the formation of dental plaque and reduce bone degeneration.
However, tannins can also interfere with nutrient absorption, as they inhibit digestive enzymes.
You have already seen that green tea is more than a warm liquid, as it has several important nutrients for the body.
Drinking the drink can bring several benefits to the body, but it is worth remembering that it is not enough to drink one or the other cup on sporadic days.
For green tea to have effects, it is necessary to drink at least 4 cups every day.
Check out some of the benefits that the product can bring:
Helps burn fat
A study published in the American Journal of Clinical Nutrition indicates the benefits of consuming green tea to potentiate fat burning.
The study evaluated two groups in the process of losing weight that adopted a low calorie menu. But only one group drank green tea (between 6 and 8 cups a day).
The results show that the participants who consumed the drink burned up to 4% more fat compared to those who only dieted.
Another study published in the journal Obesity Reviews shows similar results, indicating that the polyphenols present in the drink increase thermogenesis and oxidation of fats.
In this case, the study points out that the body spends more calories and uses fat more easily as an energy source.
Consuming at least 5 cups daily, according to the study, favors the reduction of adipose tissue, promotes an acceleration of metabolism and improves digestion.
Allied with those who want to reduce measures, green tea can interact with leptin receptors (which is the hormone responsible for the feeling of satiety).
Do you know that urge to eat more during meals? It can be minimized if leptin levels are adequate.
In addition to improving your diet, this effect can naturally reduce your meals and promote healthy weight loss.
Catechins can minimize tissue oxidation, which can decrease the risk of cardiovascular disease and diabetes.
In a study published in the European Journal of Clinical Nutrition, they point out that green tea has up to 6 times more antioxidants than black tea and up to 10 times more than fruits and vegetables in general.
The antioxidant action is mainly due to the presence of catechins and polyphenols.
For you to understand the difference (and the benefits), to get the same amount of antioxidants as 1 cup of green tea you would need to consume 8 apples.
Speeds up metabolism
Green tea has a thermogenic effect (increased caloric expenditure), promoting an acceleration of metabolism and causing the body’s caloric expenditure to be higher. This facilitates the weight loss process.
The drink also has high amounts of epigallocatechin and caffeine, which are substances directly related to thermogenesis.
Reduces the risk of cardiovascular disease
Green tea has components capable of protecting against heart disease.
Among them, the drink can reduce LDL oxidation and plasma cholesterol levels, in addition to preventing changes in vasoconstriction.
Reduces cancer risks
Studies indicate that the risks of cancer can be minimized with the regular consumption of green tea, especially breast cancer .
It is pointed out that components present in the drink can reduce or inhibit the formation of nitrosamines, which are carcinogens.
The scientific journal Life Sciences published a research in 2004 that reinforces the action of green tea in preventing or inhibiting the proliferation of cancer.
According to the results, the components present in the product can prevent bleeding from skin tumors, decrease the risks of stomach cancer, improve the body’s responses to the treatment of intestinal cancer, in addition to reducing the cell proliferation of lung cancer.
Other studies indicate that the plant can reduce the risk of women developing breast cancer when they usually drink 5 cups of the drink a day and in women between 40 and 70 years old, the risks of colorectal cancer can be reduced by up to 57%.
In men, there is 58% less chance of developing prostate cancer .
L-theanine is an amino acid rarely available in food and plants, but Camellia sinensis is one of the only plants that contain the substance.
Ingestion of the amino acid promotes the production of serotonin and dopamine, promoting feelings of well-being and happiness.
In addition, L-theanine increases the production of alpha waves in the brain. This action results in induced relaxation, causing a decrease in agitation and anxiety.
Improves mental capacity
A study published in the Journal of Medicinal Food indicates that consumption of green tea can be beneficial to mood and memory.
The research followed patients who drank the drink and compared it to a group that drank placebo.
The results suggest that the L-theanine present in the tea favored the participants’ memory and improved their ability to read and recognize words, that is, consumption is associated with improved mental alertness.
A study published in the journal Arquivo Brasileiro de Cardiologia, in 2009, performed a sample analysis on the action of Camellia sinensis and the effects on cholesterol.
The results are similar to other studies previously developed that the L-theanine present in tea can reduce the levels of total cholesterol and LDL.
Aids in digestion
There are several teas that improve digestion by stimulating the production of gastric juice. Despite the fact that green tea helps in the processes of food degradation, it acts differently on the organism, as it stimulates the intestinal microbiota.
Our gut is made up of hundreds of bacteria responsible for nutritional degradation and absorption.
As green tea stimulates the intestinal flora, the components present in meals are better used.
Reduces the risk of Parkinson’s disease
Studies point out that the phenolic substances in green tea can protect cells against a neurotoxin responsible for Parkinson’s disease.
Reduces blood pressure
Consuming green tea daily can help control blood pressure.
A study carried out in the Chinese population indicated that up to 65% of participants with high blood pressure had their levels reduced when consuming the product.
Another research carried out in 2008 and published in the Medline collection suggests similar results, pointing out that the Camellia sinensis plant can reduce the rates of hypertension and, even, decrease the values in those who do not have altered pressure.
Reduces the risk of heart attack and stroke
The components of green tea can minimize the risks of heart attack and stroke, as the drink can lower blood pressure in patients with hypertension, which is a risk factor for these conditions.
About 40% of heart attacks and up to 80% of strokes are caused or favored by high blood pressure.
Works as a diuretic
Several factors can cause the body to start retaining fluids, such as food, stress and metalism. The result of this retention is swelling, discomfort and weight gain.
As green tea has diuretic and digestive properties, consumption is ideal for eliminating the retained fluids and other toxins that can cause inflammation in the body.
Can reduce visceral fat
Although it still needs more studies and tests in humans, research published in the scientific journal Journal of Nutrition points out that green tea can reduce visceral fat and inflammation levels in the body.
This fat is present between the organs and is the most dangerous, as it is associated with high risks of chronic diseases and obesity.
Can prevent type 2 diabetes
The consumption of green tea has been associated with a reduction in the risk of type 2 diabetes. The drink can act through 2 mechanisms: reducing glycemia rates (blood sugar) or promoting an increase in insulin sensitivity.
In 2009, a scientific publication in the Journal of the American Medical Association found that people who drank about 4 cups of tea every day were up to 20% less likely to develop diabetes.
Allied to good habits, yes. It can be an aid to weight reduction or decrease in fat rates.
But, even though there may be a reduction in swelling or fluid retention, just drinking tea, be it natural or in capsules, will probably not change the weight related to the fat indexes (adipose tissue).
That is, it is possible to eliminate that feeling of bloating due to poor diet, excess sodium, PMS or heat.
But to lose weight, that is, to spend more calories, it is necessary to invest in the association of factors.
For this, it is possible to combine the drink with the routine of physical activities and good nutrition. With that, the diuretic properties and the strength that it can give in the metabolism help to reduce measures.
The intake recommendations are varied and there is not necessarily a consensus. Some people drink green tea for pleasure, taste and custom. So drinking the liquid sometimes, on those days when you want something warm, can be a way to consume it. But the benefits will be much less.
Generally, those who ingest the product sporadically tend to perceive the stimulating and energetic effects, due to the effect of caffeine.
But for those who want to see health and balance results, consumption is ideal daily. On average, it is recommended at least 2 cups of green tea if it is made from the plant (in bulk or in sachet).
This amount, according to a note from USP, confers about 350mg of polyphenols, being enough to provide benefits to the body.
But remember that there may be differences between teas made from the leaf and those sold in sachets.
In general, nutritionists suggest a maximum consumption of 4 cups a day, so that the effects of caffeine are not harmful to the body. But there are studies that were conducted with participants who drank between 5 and 8 cups every day.
If the consumption is through the powdered product, 2 glasses a day are recommended. Each glass should be prepared with 200mL of water and 10g of tea.
For the product in capsules, ingestion should follow the manufacturer’s recommendations. In general, they are between 2 and 4 capsules a day.
In general, making tea is very simple: as easy as boiling water, right? Not so much.
Although it is an easy preparation (hot water and grass), some tips can help you preserve the properties of the plant, improving the benefits of it to the body.
The ideal is to put 1 liter of water to heat and, as soon as the first air bubbles start to appear, turn off the fire. That is, if you prepare tea with boiling water, you may be losing the drink’s properties.
The right measure is to use 2 tablespoons of the herb for each liter of water.
If you are preparing the herb in bulk, traditions recommend that water be added to the herb (not the herb to the water), as the movement and pressure of the liquid on the leaves is sufficient to mix and extract the principles properly.
Cap the container to allow the infusion to occur and wait between 2 and 3 minutes before straining.
If the drink is strained too fast, some properties have no time to be released.
Not everyone likes the bitter taste of green tea, but sweetening the drink may not be the best option, especially if it is made with refined sugar.
A tip for those who want a more pleasant flavor or want to vary from day to day is to mix other ingredients. Herbs such as mint, chamomile, lemongrass and lemon can be combined and make consumption more pleasant. Some suggestions are:
Green tea with lemon
The lemon is very suitable for flavoring green tea and enhancing its effects.
Allied with those who want more health or want to lose weight, the lemon strengthens the immune system (because it is rich in vitamin C) and gives a strength to accelerate the metabolism.
To prepare the drink, add the lemon juice to the ready green tea and then consume it.
Green tea with ginger
Like lemon, ginger gives more flavor and optimizes the effects of green tea.
To prepare the drink, add the chopped ginger to the water, before infusing it with green tea. After the infusion, strain (the product can enhance the thermogenic effects of the drink, promoting better results if the goal is to reduce weight).
Green tea with other herbs
For those who want to vary the flavor, add other nutrients and benefits to the drink, just mix the desired herb, such as chamomile, hibiscus or mint, with the green tea leaves and make the infusion normally.
Despite having essential elements for the body, such as vitamins, green tea can cause side effects. Usually, its consumption is well tolerated, except for people with hypersensitivity to some component of the plant, but some adverse effects can appear, such as:
Anxiety, restlessness and insomnia
As the drink has caffeine and acts as a physical and mental stimulant, signs such as agitation, insomnia and anxiety can appear, especially in people sensitive to the substance.
Caffeine can cause headaches, nausea, difficulty breathing (or breathing too fast) and increased heart rate. In such cases, the effects are transient and subside within a few hours.
In general, women are more sensitive to the action of caffeine and, therefore, may have more adverse effects.
Reduced iron absorption
Some research suggests that the drink may decrease iron absorption.
Ideally, tea should not be taken with food, as it can interfere with nutritional use.
It is suggested that people with anemia , pregnant women and lactating women avoid consumption.
The catechins present in the plant can stimulate the production of gastric juice and cause irritation of the stomach mucous membranes.
The consumption of the product should be avoided on an empty stomach and by those who have ulcers, gastritis or reflux.
Interference with pregnancy and breastfeeding
Although there is no direct or known risk of green tea for pregnant women, it is necessary to be attentive to the product.
There are studies that suggest that drinking can reduce the levels of folic acid in the mother, which can cause changes in the baby’s formation.
Therefore, pregnant women should not consume green tea without the doctor’s knowledge.
In addition, other research indicates that caffeine can be absorbed by breast milk and be harmful to the baby.
It is indicated that frequent consumption of green tea can interfere with fertility.
A study published in the Journal of Functional Food pointed out that the plant can impact reproduction, especially the female.
The research was carried out with flies and, for this reason, it needs more deepening and tests in humans.
According to the publication of the Brazilian Society of Hepatology, which analyzed the toxicity of plants and herbs, green tea can cause changes in the functioning of the kidneys.
In general, the consumption of the drink is quite safe, but there are medical reports in which the patient suffered severe kidney damage due to the consumption of the plant.
Normally, liver effects are caused when there is excessive consumption, but the amount can be quite variable.
In 2015, a teenager suffered severe hepatitis caused by the daily consumption of 3 cups of green tea.
It is easy to find diets that suggest and a daily intake of about 5 cups (which can reach 8). That is, the young woman consumed little more than half of what was indicated and still had serious side effects.
Frequent consumption of the drink can also cause changes in the functioning of the intestine, causing constipation , cramping and pain in the belly due to constipation.
Elevated blood pressure
Although one of the possible benefits that the consumption of green tea brings is the reduction of high blood pressure, there are studies that indicate the ability of the drink to raise it, especially if consumed together with other stimulants (such as energy drinks, antidepressants and phenylpropanolamine).
Despite the benefits, green tea may be discouraged for some people, such as:
- Patients with hypothyroidism (fluoride can aggravate thyroid gland dysfunction);
- Patients with iron deficiency anemia (it is suggested that green tea may decrease iron absorption, therefore, patients with anemia due to lack of iron should not ingest);
- Patients with punctual or persistent insomnia (if there are difficulties in sleeping or staying asleep at night, green tea can aggravate the condition due to caffeine);
- Pregnant and lactating women;
- Patients with heart problems or hypertension (although there are studies indicating the use of tea as beneficial to the heart, patients with cardiac dysfunction and hypertension should consume it under medical advice);
- People with gastritis and reflux;
- Patients with chronic diseases or being treated with any medication (the consumption of green tea should always be informed to the doctor, due to possible interactions and adverse effects).
There are medications that can have the action interfered by the consumption of green tea. If you use any medicine (whether continuous or punctual), you must be aware of the consumption of the drink.
Among the compounds that have reports of interaction with green tea are:
- Adenosine : tea can inhibit the action of adenosine and affect heart rate.
- Antibiotics: green tea can increase the effectiveness of the medicine, affecting the intestinal flora, causing resistance of the immunity and causing other problems to the organism;
- Benzodiazepines: caffeine from green tea can reduce the relaxing and calming effects;
- Beta-blockers, propranolol and metaprolol: caffeine can increase blood pressure and interfere with the action or dosage of medications;
- Aspirin and warfarin : vitamin K can inhibit the anticoagulant action of warfarin. With aspirin, the risk of bleeding is high, as there is more difficulty in blood clotting;
- Clozapine : may have a reduced or inhibited effect if it is taken at times close to green tea;
- Ephedrine : the caffeine in green tea, along with ephedrine, can promote restlessness, insomnia, weight loss and tremors;
- Lithium : green tea can cause the blood levels of lithium to drop;
- Monoamine Oxidase Inhibitors (MAOIs): the ingestion of tea can raise blood pressure and alter the action of the medication;
- Oral contraceptives : contraceptives can prolong the effects of caffeine and increase the stimulating action;
- Phenylpropanolamine: the combination of caffeine and medicine, can cause mania, agitation and a severe increase in blood pressure.
With so many benefits, green tea would not remain just in the area of nutrition. The product currently participates in a series of cosmetics and aesthetic treatments for the skin and hair, for example.
Some properties of green tea in aesthetics include:
Improves skin irritation
It can be applied to irritated, itchy skin and insect bites to reduce redness, promote antibacterial action or assist in skin recovery.
After washing your face, you can moisten a cotton ball with tea and apply it to your skin. Its action can help to control the oiliness of the skin.
The astringent action of the herb promotes a rebalancing of oiliness, in addition to gently cleaning the layer.
It can also be applied to the hair, helping to control the oiliness of the strands.
For a youthful appearance
Green tea can decrease skin inflammation, improve elasticity and prevent wrinkles.
For those who already have mild expression marks, the product can have significant effects.
However, if the lines and signs of the skin are deep, the effects may not be as noticeable.
For those with acne , a study published by the Journal of Investigative Dermatology suggests that the plant’s properties can accelerate the healing process and decrease the appearance of new pimples.
As a facial tonic
The skin receives many benefits from the application of green tea. The surface that is affected by acne, has been exposed for long periods to the sun or has expression marks may have a renewed appearance with the daily or weekly application of tea.
For dark circles and puffiness
Tired, swollen eyes or dark circles under the eyes can be helped by the effects of green tea. Performing cold compresses in the region can improve the appearance around the eyes.
For lymphatic drainage
Mixing green tea in creams or using products that bring the herb into the composition can help to reduce measures, potentiating the action of lymphatic massages.
The aim of the treatment is to activate the circulation of the massaged region (usually belly, thighs and arms) and facilitate the reduction of localized fats.
As green tea has a stimulating action, it can accelerate the responses of the aesthetic treatment.
In sun protection
Studies carried out in the 2000s point out that green tea has great potential against skin aging and can reduce the damage caused by sun exposure.
Recent research also points out that green tea extract applied topically (in cream or gel) to the skin can reduce inflammatory processes and offer considerable protection against UVB rays.
Improves healing and prevents skin marks
A study carried out with animals in 2009, on the effects of green tea on skin healing, developed by researchers from USP, showed that mice that drank green tea 1 week before surgical procedures had an accelerated skin recovery and decreased edema (purple marks on the skin) compared to animals that have not ingested the drink.
There are cosmetic products based on green tea, such as revitalizing creams and face masks with very varied prices, but which are not always accessible to people (either for value or availability in stores).
For those who want to enjoy the benefits of the plant and do not want to pay large amounts, the best tactic is to do the treatments at home.
Check out some recipes below:
Place 100 grams of green tea leaf in half a liter of heated water (without boiling) and let it sit for 1 hour.
Strain the liquid and apply with a cotton, making circular movements across the face.
If the product is purchased in powder, the mixture can be made by adding a few drops of water to 1 teaspoon and mixing until it forms a paste.
The product can be applied directly to the skin, leaving it to act for about 20 minutes, and then rinsed.
In addition, you can mix the powder directly into the oil or body cream, to use as usual.
To obtain the benefits of the plant, you can make the tea normally (2 spoons of the plant for each liter of water) and apply the liquid on the face with the help of a cotton wool or with the help of a spray bottle.
Then rinse or apply a cotton wool slightly moistened with water.
Moisturizing face mask
The mask can be used even on oily skin and promotes deep hydration.
To prepare it, infuse the tea and use a spoon of the liquid (or also 1 spoon of powdered green tea) in a spoon of honey. Apply to the face and let it act for 20 minutes. Wash with cold water.
Exfoliating for the skin
Make the infusion and use the moist leaves to prepare the scrub.
Mix it with 1 spoon of sugar and 1 spoon of honey or some vegetable oil (such as coconut or almonds). Apply to the skin using circular motions.
Wash thoroughly to remove the product.
You can mix powdered green tea in your shampoo or use moist herbs (after making the infusion, mix them with the product).
Use to wash your hair as usual, but remember to rinse the hair thoroughly.
Moisturizing hair cream
Mix some oil of your choice (almonds, coconut or grape seed , for example) with the leaves or powder of green tea.
Ideally, if you use the leaves, a mixer or blender should be used to prevent large pieces from remaining in the product.
You can replace styling creams or moisturizing masks with green tea moisturizer.
The product is easily found, being sold in health food stores, handling pharmacies, commercial pharmacies and some food stores.
If you are looking for products with green tea (like shakes and industrialized teas), bakeries and supermarkets are also on the list of places they sell.
The values vary according to the type of product and the brand. In sachets, there are options that mix flavors of pineapple, ginger, mint and green tea, from R $ 4 to R $ 20.
Among the encapsulated products, there are options that vary between R $ 15 and R $ 60. The soluble versions are around R $ 40.
At Consulta Remédios , a comparator of online pharmacy prices from all over Brazil, you can find the best offers of establishments that deliver in your region.
It is said that in the year 2737 BC the emperor Shen Nong maintained a habit of drinking warm water as a way of taking care of his health, while walking through the courtyards and open spaces. One day, in the middle of his ritual, a leaf fell into the glass of water and promoted a slight infusion of the plant.
The emperor, when drinking the liquid, noticed the change in flavor and aroma. Enchanted by the transformation of water, the drink was considered a product of the gods and, thus, began the tradition of drinking teas.
The story is part of Chinese mythology, but the truth is that China has an important role in the dissemination of tea culture.
The consumption of the product is quite traditional in the country, and Chinese immigrants also play an important role in exporting tradition.
In Brazil, teas arrived around 1812, mainly with the intention of being planted and exported to Europe.
However, exports did not develop as well as expected and the planting of Camellia sinensis was replaced by coffee cultivation.
But the habit of drinking tea was already part of several countries and was also consecrated in Brazil.
Especially with the arrival of Chinese immigrants, the drink continued to be consumed and, today, represents a highly significant share of the national market.
Can you have green tea at night?
As the drink has caffeine, it can interfere with the quality of sleep. The ideal is to take it between meals.
What is the best time to drink green tea?
In general, there is no fixed or more suitable schedule – it depends on the objectives and the food routine. The drink can be consumed after meals or before any physical activity. The important thing is to avoid drinking too close to bedtime, due to the caffeine present in the plant.
How much green tea per day?
In general, it is recommended that consumption be at least 2 cups a day to obtain the benefits of the plant. But that dose should not exceed 4 cups, mainly due to caffeine, which can affect sleep.
How much caffeine is in green tea?
Caffeine can be a great aid for those who need energy or want to scare off sleep. For many people, the day really only starts after a cup of coffee – or not so small. But teas also contain caffeine, so excessive consumption can affect sleep, cause restlessness or promote side effects.
Green tea has a lower concentration of the substance. To make a comparison, 240mL of strained coffee can reach 200mg of caffeine, while the same amount of green tea can reach just 40mg.
Despite the lower caffeine concentration, daily consumption can be up to 6 cups (varying according to studies, researchers and objectives). Therefore, if you take the maximum recommended dose, the amount of caffeine can reach 240mg.
Can I make a single amount of tea to drink during the day?
-Yeah . Just follow the recommended dosages (2 teaspoons of green tea for each liter of water) and keep it in a suitable container, in the refrigerator or at room temperature. But the ideal is that the drink is consumed within 24 hours, preventing the properties from being lost.
How to store green tea?
The product you buy in bulk is dehydrated, so the shelf life is usually quite long. But leaving the herb in contact with the air for long periods causes it to undergo a gradual oxidation, reducing its properties.
The ideal is to keep green tea protected from moisture, sunlight and stored in a well-sealed pot or packaging. In general, you can keep it in the closet, but if the area you live in is very hot, it is best to put it in the refrigerator.
Once ready, how to drink green tea?
The drink can be prepared with each consumption or made in larger quantities. In the latter case, you should store it at room temperature or in a refrigerator for a maximum of 24 hours. During this period, green tea does not lose its properties and can be consumed throughout the day.
Can you sweeten green tea?
You should avoid using refined sugar and artificial sweeteners. If you want to sweeten, honey can be a good option. Although there are no changes in the properties of the drink, sweeteners (sugar, honey or diet) can make the drink more caloric.
Are sachet, powder and capsule teas all the same?
Partly yes. All of them originate from Camellia sinensis , but each one will have different industrial processes, in addition to presenting very different nutritional concentrations. You should always refer to the label to verify the properties of the product.
Those looking for tasty, natural and healthy alternatives to drink, find teas an excellent alternative.
Green tea, which can be served to ward off the cold or refresh, has a variety of beneficial properties for the body. For this reason, the product has gained the status of functional food.
Whether in sporadic consumption, just for taste, or daily, taking advantage of the plant’s components, green tea can be an ally to health and well-being.
To find out more benefits and uses of plants and other foods, keep an eye on the Healthy Minute!