Home
Articles
Q&A

What are the effects and benefits of green tea?

Sep 13, 2025 Source: Cainiu Health
Dr. Yu Yongchao
Introduction
Under normal circumstances, as a common beverage, green tea has various effects and functions, mainly including clearing heat and relieving summer heat, refreshing the mind, promoting metabolism, protecting oral health, and assisting in antioxidant activity. When drinking green tea, one should avoid consuming it on an empty stomach to prevent irritation of the gastrointestinal tract; excessive consumption before bedtime should also be avoided to prevent caffeine from affecting sleep; individuals with weak or cold gastrointestinal systems should reduce their intake and opt for weaker tea.

Generally speaking, as a common beverage, green tea has various functions and benefits, mainly including clearing heat and relieving summer heat, refreshing the mind, promoting metabolism, protecting oral health, and assisting in antioxidation. The specific details are as follows:

1. Clearing Heat and Relieving Summer Heat: Green tea is cold in nature with a sweet and bitter taste, capable of dispelling internal heat. It is especially suitable for consumption in summer. During hot weather or when experiencing dry mouth, irritability, and heat discomfort, drinking green tea can help cool the body, quench thirst, relieve discomfort caused by summer heat, and replenish bodily fluids.

2. Refreshing the Mind: Green tea contains caffeine, which can stimulate the central nervous system, enhance brain activity, alleviate fatigue and drowsiness. When feeling mentally exhausted during work or study, drinking an appropriate amount of green tea can help focus attention, improve reaction capability, and restore energy.

3. Promoting Metabolism: The polyphenols and caffeine in green tea can accelerate bodily metabolism, assist in fat breakdown and consumption, and promote intestinal motility, thereby improving intestinal function. Long-term moderate consumption can help maintain metabolic balance.

4. Protecting Oral Health: The polyphenols in green tea have certain antibacterial properties, which can inhibit the growth of harmful bacteria in the mouth, reduce odor-causing substances produced by bacteria, thus helping to freshen breath and reduce bad breath. Additionally, it can assist in preventing plaque formation, offering certain protective benefits for oral health.

5. Assisting Antioxidation: The polyphenols in green tea are potent antioxidants that help eliminate excess free radicals in the body, reducing cellular damage caused by free radicals. Long-term moderate consumption can provide certain antioxidant support for the body, assisting in maintaining stable bodily functions.

When drinking green tea, avoid consuming it on an empty stomach to prevent gastrointestinal irritation; excessive consumption before bedtime should be avoided to prevent caffeine from affecting sleep; individuals with cold stomachs or intestines should reduce intake and opt for weaker tea to ensure comfort and health while drinking.

Related Articles

View All
What are the functions and effects of green tea?
Under normal circumstances, the main functions and benefits of green tea include antioxidant effects, refreshing the mind, promoting digestion, protecting teeth, and diuretic and fatigue-relieving properties. When drinking green tea, it is not advisable to consume overly concentrated tea, as this may irritate the stomach or cause nervous excitement. It is also not recommended to drink green tea on an empty stomach to avoid damaging the gastric mucosa. Additionally, consumption should be reduced before bedtime to prevent disruption of sleep quality.
avatar
Dr. Sun Lianqing
View Full Answer
Can saffron be steeped in hot water together with tea leaves?
Under normal circumstances, saffron can be steeped in hot water together with tea, but it should be consumed in moderation. When drinking water infused with both saffron and tea, note that the typical amount of saffron should be 3–5 threads per serving, while the tea should be used according to standard brewing measurements. Excessive amounts of either may result in a bitter taste or increased bodily strain. It is not recommended to consume this mixture before bedtime, especially when combined with caffeinated teas such as green tea.
avatar
Dr. Sun Lianqing
View Full Answer
Can people with cold body constitution drink green tea?
In general, whether individuals with a cold body constitution can drink green tea depends on the severity of their condition. Those with a mild cold constitution may occasionally consume small amounts, while those with a severe cold constitution are advised against drinking it. To improve cold body conditions, it is recommended to choose warm-natured beverages in daily life, such as brown sugar ginger tea, longan and red date tea, etc. Additionally, it is important to stay warm and avoid prolonged exposure to cold environments.
avatar
Dr. Sun Lianqing
View Full Answer
What to eat after a meal to prevent fat absorption
Under normal circumstances, consuming foods such as oats, chia seeds, apples, broccoli, and green tea after meals may also help block fat absorption. Additionally, under a doctor's guidance, medications such as orlistat capsules, metformin hydrochloride tablets, acarbose tablets, lovastatin capsules, and fenofibrate capsules can be taken to assist in preventing fat absorption. It is also important to control total calorie intake and combine this with appropriate physical activity in daily life.
avatar
Dr. Shen Yonghua
View Full Answer
Do people with excessive dampness drink black tea or green tea?
Whether individuals with excessive dampness should choose black tea or green tea depends on the type of dampness. Those with cold-damp constitution are suitable for drinking black tea, while those with damp-heat constitution are suitable for green tea. In daily life, in addition to selecting teas according to their constitutions, individuals with excessive dampness should also pay attention to dietary regulation, avoid raw, cold, and greasy foods, engage in appropriate exercise to promote blood circulation and dampness elimination, and maintain the body's yin-yang balance.
avatar
Dr. Sun Lianqing
View Full Answer
What to Eat in Summer to Combat Fatigue and Boost Energy
Under normal circumstances, summer fatigue can generally be alleviated by consuming foods such as mint, lemon, watermelon, nuts, green tea, and medications including Vitamin B1 tablets, Vitamin B12 tablets, ginseng royal jelly capsules, Acanthopanax capsules, and Compound Ejiao (donkey-hide gelatin) syrup. Mint has a fresh aroma and contains menthol, which can stimulate the nerves and create a cool, refreshing sensation.
avatar
Dr. Yu Yongchao
View Full Answer
Do people with excessive dampness drink black tea or green tea?
Black tea is a fully fermented tea with a mild nature. After fermentation, the content of tea polyphenols decreases, while caffeine and aromatic substances are retained. Drinking black tea can promote blood circulation and help eliminate dampness from the body. Its warming properties can also nourish the spleen and stomach, improve impaired dampness metabolism caused by deficiency-cold in the spleen and stomach, regulate the body's metabolism to a normal state, and reduce accumulation of dampness.
avatar
Dr. Sun Lianqing
View Full Answer
Can patients with appendicitis drink tea?
Patients with appendicitis can generally consume tea in moderation during the stable phase of their condition. Tea contains beneficial substances such as polyphenols, which can help moisten the intestines and relieve constipation, thereby improving symptoms such as constipation and dry stools, and also help replenish the body's water needs. Regarding tea selection, patients with appendicitis may prioritize green tea and chrysanthemum tea. Green tea is rich in polyphenols, which can help improve the body's inflammatory status.
avatar
Dr. Wang Lei
View Full Answer
彩牛养生

Your trusted source for health information and wellness guidance.

Quick Links

Resources

Connect

© 2024 HealthPortal. All rights reserved.