Black Tea Benefits: 9 Effects & How to Make It

Evidence-Based
Tatiana Zanin
Clinical review: Tatiana Zanin Registered Dietitian CRN-3 15097
Created by: Tua Saude editing team

Black tea benefits come from its high levels of antioxidants, such as catechins and polyphenols, which help reduce inflammation and protect cells from damage. It is also one of the most widely consumed beverages worldwide.

Because of these compounds, black tea benefits may include improved digestion, better blood sugar control, support for weight loss, and a lower risk of heart disease. Its effects are mainly linked to its antioxidant content and natural caffeine.

Black tea benefits are also influenced by how the leaves of the Camellia sinensis plant are processed, which increases oxidation and gives the tea its stronger flavor and unique properties. These characteristics help explain its effects on metabolism, brain alertness, and overall health.

This content is solely for informative purposes and should not replace a medical consultation. Do not interrupt your current treatment without seeking medical guidance.
mug of black tea

Main benefits

Black tea may provide the following health benefits:

1. Preventing premature aging

Black tea contains good amounts of antioxidants that help prevent excessive oxidation caused by free radicals. This helps protect tissues, keep cells healthy for longer, and delay premature aging.

2. Supporting digestion and treat diarrhea

Black tea can help when your stomach feels heavy or overly full, as it supports digestion and may aid the body in eliminating waste.

Black tea also contains tannins, which can help reduce intestinal inflammation. This may relieve intestinal pain and help control diarrhea.

3. Reducing appetite and support weight loss

Drinking one cup of black tea daily for at least three months may help reduce appetite and slightly increase metabolism, which can support weight loss and help reduce waist circumference.

These effects are thought to be related to its antioxidant compounds, particularly flavonoids, as well as its caffeine content. However, while black tea may help control appetite, it should be combined with a balanced, varied diet and regular physical activity, such as walking for 30 minutes a day.

4. Helping manage diabetes

Black tea contains phenolic compounds that help regulate blood glucose levels. This may make it a useful support option for people with diabetes or prediabetes due to its effect on pancreatic beta cells.

5. Helping cleanse the skin

Applying black tea to the skin can be a good way to help fight acne and oily skin. Simply apply warm tea with gauze or cotton directly to the area you want to treat, leave it on for a few minutes, and then wash your face.

6. Lowering cholesterol

Black tea extract may help improve how the body processes cholesterol, possibly by reducing the reabsorption of bile acids. This effect may contribute to lowering the risk of metabolic syndrome.

7. Preventing atherosclerosis and heart attack

Black tea is rich in flavonoids, compounds that help protect the cardiovascular system. They work in part by preventing the oxidation of LDL cholesterol, a process that contributes to the formation of atherosclerotic plaques and increases the risk of thrombosis (blood clots).

8. Keeping the brain alert

Another benefit of black tea is that it can help keep the brain alert, because it contains caffeine and L-theanine. These compounds improve cognitive performance and increase alertness, making black tea a good option for breakfast or shortly after lunch.

This effect can usually be noticed about 30 minutes after drinking black tea.

9. Helping prevent cancer

Black tea contains catechins, which may help prevent and fight cancer. These compounds are thought to protect cellular DNA and promote the death of tumor cells.

How to prepare

Black tea can be prepared with dried leaves, which can be found loose or in tea bags.

Ingredients:

  • 1 cup of boiling water

  • 1 black tea bag or 1 teaspoon of dried black tea leaves

How to prepare:

Add the tea bag or black tea leaves to the cup of boiling water, cover, and let it steep for at least 5 minutes. Strain and drink while still warm.

To make black tea taste milder, you can add a little warm milk or the juice of half a lemon. This drink can be consumed warm or cold.

Caffeine content

The amount of caffeine in black tea can vary depending on how much tea is used to prepare it.

In general, tea made with about 1 g of dried leaves (roughly ½ teaspoon of loose tea) and 3-4 fluid ounces of water contains around 6% caffeine. In comparison, a typical cup of coffee may contain up to about 25% caffeine.

Potential side effects

Drinking moderate amounts of black tea is generally safe. According to the U.S. Food and Drug Administration, up to 400 mg of caffeine per day is not generally associated with negative effects for most adults, although sensitivity can vary.

However, drinking more than 5 cups per day may cause side effects due to caffeine, such as headache, nervousness, sleep problems, vomiting, irritability, tremors, stomach pain, and dizziness.

Who should avoid it

Black tea is not recommended for children under 12 years old. People who are pregnant or breastfeeding should also avoid drinking it unless advised by a doctor or midwife.

Black tea is generally not recommended for people with high blood pressure, as its caffeine content may slightly raise blood pressure. However, this effect is usually less pronounced in people who regularly consume caffeinated drinks, such as coffee.

People with iron deficiency should also consume this tea in moderation, as it contains tannins that can reduce iron absorption. In these cases, it is recommended to drink the tea at least 1 hour after main meals.

Update History
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