Black Tea


Smart Grocery Shopping When You Have Diabetes

Do You Know the Benefits of Walking?

Surprising Things You Didnt Know About Dogs and Cats

Latest Facts on COVID-19 Vaccine Boosters

Study Finds COVID Vaccine Protection Dropped Over 6 Months

28 Million Years of Life Lost to COVID

COVID Expert Q&A: This Pandemic Still Has Legs

High Humidity + Heat Magnifies Climate Threat

Dr. Whytes Book: Take Control of Your Cancer Risk

How Breast Cancer Changed My Life … and Me

Health News and Information, Delivered to Your Inbox

Medically Reviewed byNeha Pathak, MD

Black tea is made from the leaves of a bush calledCamellia sinensis. It has caffeine as well as other stimulants andantioxidants. Lots of people in the U.S. drink it either hot or cold. It should always be steeped in hot water before it is cooled.

A process called oxidation turns the leaves from green to a dark brownish-black color. Oxidation means the leaves are exposed to moist, oxygen-rich air.

Teamanufacturers can control the amount of oxidation. Black tea is a fully oxidized tea. Green tea comes from the same plant, but is not oxidized.

Black tea extract is sometimes sold as an herbal supplement. Sometimes, the supplement includes other types of herbs, vitamins, or minerals.

Many people drink black tea just because they like it. People also may use it for:

More research is needed, but theres some evidence drinking black tea regularly may lower your risk for these conditions:

Drinking black tea in moderate amounts is generally safe for most people. Theres no known right amount to drink. Supplement ingredients and quality may vary widely. This makes it hard to set a standard dose.

Drinking large amounts of black tea — more than four or five cups a day — may cause health problems. Thats mostly because ofcaffeine-related side effects.

Side effects of black tea (most often in high amounts) may include:

Combining black tea with other types of caffeine or a product called ephedra can be very dangerous. Some of the problems it can cause include:

Black tea or black tea supplements may interfere with other medicines andsupplementsyou are taking. Some medicines can also cause caffeine to stay in your body longer than usual. Talk to your doctor to find out if any medicines you are taking may have this effect. The caffeine in black tea may also interfere with certainbloodtests. Always tell your doctor about any supplements you are taking, including natural ones and those bought without a prescription. Let your doctor know if you drink a lot of black tea.

If you use supplements with black tea, keep in mind that the FDA does regulatedietary supplements; however, it treats them like foods rather than medications. Unlike drug manufacturers, the makers of supplements dont have to show their products are safe or effective before selling them on the market.

National Cancer Institute: Tea and Cancer Prevention Fact Sheet.

Roberts, A.Alternative Medicine Review, 2005.

The Leaf: Oxidation and Fermentation in Tea Manufacture.

National Cancer Institute: Tea and Cancer Prevention Fact Sheet.

Natural Medicines Comprehensive Database: Black Tea.

Baker, J.A.International Journal of Gynecological Cancer, January-February 2007.

Gardner, E.J.European Journal of Clinical Nutrition. January 2007.

Hodgson, J.M.Food and Function, January 19, 2013.

Hodgson, J.M.Molecular Aspects of Medicine, December 2010.

Journal of Human Nutrition and Dietetics: Impact of tea drinking on iron status in the UK: a review.

Nutrients: Tea compounds and the gut microbiome: Findings from trials and mechanistic studies.

Journal of Taibah University Medical Sciences: Influence of black tea onStreptococcus mutansandLactobacilluslevels in saliva in a Saudi cohort.

© 2020 WebMD, LLC. All rights reserved.

Click to view privacy policy and trust info

Video: Why You Need Zinc and Where to Find It

Is Garcinia Cambogia Safe for Weight Loss?

Blackberries Are a Fruit Full of Fiber and Flavor

Heart Disease and Antioxidants, Vitamin E, and Beta-Carotene

20 Common Foods With the Most Antioxidants

Ease hot flashes and other symptoms.

© 2005 – 2021 WebMD LLC. All rights reserved.

WebMD does not provide medical advice, diagnosis or treatment.

Leave a comment