What Happens to Your Body When You Drink Green Tea Every Day
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- Green tea is rich in plant compounds that have anti-inflammatory and antioxidant effects in the body.
- Drinking green tea often has been linked to benefits for your heart, brain, skin, and more.
- When incorporating green tea into your diet, make sure to start with a moderate amount and pay attention to how it affects your body.
Drinking green tea every day isn’t just a comforting ritual—it's also a way to increase your consumption of compounds that support your heart heart, brain health, and more. Here’s how your health might change if you make green tea a part of your routine.
1. Possible Lower Cancer Risk
Green tea is full of catechins a type of antioxidant that helps protect your cells from damage. These plant compounds may be able to help suppress the growth of unhealthy cancer cells and reduce inflammation in the body.1
Studies show that drinking green tea regularly is associated with a lower risk of prostate and breast cancers.23 While more research is needed, including green tea as part of a balanced diet may support cancer prevention overall.4
2. An Immune System Boost
Polyphenols, plant compounds found in green tea, have antioxidant and anti-inflammatory effects that support a healthy immune response.5 Plus, green tea contains a compound called L-theaninewhich may be able to boost the function of infection-fighting cells and reduce inflammation.678
As a result, green tea may be able to bolster your resilience to everyday illnesses like colds or the flu. However, more research is needed.9 Physical activity, a balanced diet, quality sleep, and other healthy habits can also help your immune system stay strong.10
3. Potential for Sharper Cognition
Regularly drinking green tea has been linked to better brain health in middle-aged and older adults, especially when it comes to memory and thinking skills. These benefits may come from green tea's antioxidants—they help protect brain cells from cellular damage called oxidative stress, which is considered a driving force behind age-related cognitive decline.1112
Research also suggests that L-theanine in green tea may improve certain brain tasks, such as reacting quickly to information and sustaining attention. A review found positive effects in these areas, though differences in study designs and small sample sizes mean the results aren’t yet conclusive.13
4. Possible Increase in Metabolism
Antioxidants in green tea called catechins—especially epigallocatechin-3-gallate (EGCG)—may help marginally boost your body's ability to burn fat and calories.14
In one small study of 13 women, matcha green tea improved fat burning during brisk walking.8 A broader review of studies including both men and women found that green tea supplements may be linked to fat loss when coupled with exercise; however, the effect was modest.15
Green tea is no replacement for regular exercise if you're looking to burn fat, but it's possible that drinking it alongside a healthy diet and regular exercise could give your metabolism a small lift.
5. Better Heart Health
Green tea contains antioxidants like polyphenols and catechins, which reduce harmful compounds called free radicals in the body. Among other benefits, limiting free radicals can keep blood vessels healthy and reduce stiffness of the arteries.16 As a result, studies show that regular green tea can lower both systolic and diastolic blood pressure.17
In addition, research suggests drinking green tea regularly can help lower low-density lipoprotein (LDL), or "bad," cholesterol and total cholesterol.18
Because of these benefits, green tea consumption may be able to help lower your risk of cardiovascular disease when coupled with a heart-healthy diet overall.17
6. More Stable Blood Sugar
Drinking green tea may help keep blood sugar in check for people with type 2 diabetes.19 Short-term studies found that green tea was associated with lower fasting glucose, a measure of the amount of sugar in your blood when you haven't eaten for a while.20 More recent, larger studies suggest that regular green tea may help improve blood sugar and insulin resistance in people with the condition.19
However, research is mixed—some studies show that green tea doesn't seem to have an effect on insulin levels or hemoglobin A1C (HbA1c), a blood test that shows average blood sugar over the past three months.2118
Overall, green tea works best in tandem with other healthy habits for blood sugar, including maintaining a healthy weight and eating a balanced diet.22
7. Healthier Skin
With their antioxidant and anti-inflammatory properties, catechins in green tea may help protect against ultraviolet (UV) rays, research suggests. UV-related damage is a major cause of premature aging and skin issues such as redness or sunburns.23
Green tea may also offer benefits for certain skin concerns—a 2016 study linked green tea extract with reduced acne lesions in adult women. However, the extract was much stronger than what you’d get from a cup of tea, and more research is needed to see if regular green tea consumption would lead to the same results.24
8. Possible Improvements in Gut Health
Green tea and your gut bacteria have a two-way relationship. Green tea can encourage the growth of some healthy bacteria, while also limiting the growth of harmful ones. Then, these healthy gut bacteria break down green tea compounds into smaller molecules, which may contribute to some of its health effects elsewhere in the body.25
More research is needed to fully understand how this works, but in general, green tea can be part of a balanced, gut-healthy diet—especially when you pair it with fiber-rich foods like whole grains or vegetables.
How To Make Green Tea Part of Your Day
Green tea can be a healthy addition to your routine, but everyone’s caffeine sensitivity, taste preference, and health goals are different. Here’s how to find what works for you:
- Start with a moderate amount: Though some studies have followed participants drinking as many as seven cups of green tea per day, most adults can see health benefits from just 1–2 cups daily.2627 People should be especially mindful of their green tea consumption if they're drinking other caffeinated beverages throughout the day—a standard mug of green tea contains around 37 milligrams of caffeine, and adults should have no more than 400 milligrams per day.28
- Mind the brewing: For the greatest boost of antioxidants, steep green tea for 5–10 minutes in very hot water (around 100° Celsius or 212° Fahrenheit). However, note that longer brew times, especially over 10 minutes, may lead to more bitter tea.29
- Notice how your body responds: Pay attention to energy, focus, or digestion after drinking green tea. Adjust the timing—morning, mid-afternoon, or with meals—based on what feels best for you.
- Try different ways to enjoy it: Whether it's iced, served with a slice of lemon and mint leaves, or blended into smoothies, find what makes green tea enjoyable for your routine.
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