The review shows that tea, especially green tea, can help stop heart disease, obesity, diabetes, and some cancers. It also protects the brain, reduces muscle loss in older people, and fights inflammation and germs. But bottled and bubble teas often contain bad additives like artificial sweeteners and preservatives.
Tea is made from the leaves of the Camellia sinensis plant. People have drunk it for centuries, first for its healing powers and later as a tasty beverage. The drink is rich in polyphenols, especially catechins, which give it many health benefits. This article looks at how tea influences several health problems, using both lab experiments and human studies. While green tea is studied a lot, we still know little about black, oolong, and white teas.
A recent study in Beverage Plant Research by scientists from the Chinese Academy of Agricultural Sciences says more research is needed to fully understand tea’s advantages and risks.
Green tea can lower blood pressure and improve cholesterol levels. Long‑term tea drinkers have a lower chance of early death, heart disease, and certain cancers. The catechins in tea also help with weight control, aiding weight loss and improving metabolism in overweight people. Moreover, regular tea drinking may keep the brain sharp and reduce signs of Alzheimer’s, especially in seniors.
Tea may also protect muscle mass in older adults, helping them stay strong. However, many commercial teas contain sugar, artificial sweeteners, and preservatives that can cancel these benefits. Some teas may have pesticide residues, heavy metals, or micro‑plastics. Although these contaminants are usually low, heavy tea drinkers should be cautious. Tea can also interfere with the absorption of iron and calcium, which matters for vegetarians or those with special nutrient needs.
In short, drinking fresh, brewed tea in moderation supports heart health, diabetes prevention, and cancer protection. It is wise to limit bottled and bubble teas because of added sugars and chemicals. Future studies should examine the long‑term effects of different tea types and the impact of contaminants.