Both black and green tea contain caffeine, which stimulates the nervous system and encourages the release of feel-good ...

Because of its naturally high caffeine content ... and plant compounds that are characteristic of Assam tea. Black teas like Assam contain several unique plant compounds, including theaflavins ...

Black tea does not contain as many B vitamins as ... Adverse effects are usually associated with taking more than 500mg of ...

Consuming moderate amounts of caffeine lowers the risk of developing multiple metabolic conditions like diabetes, heart ...

In contrast, an 8 oz cup of coffee typically has a high caffeine content of ... made using the leaves of a special tea plant, ...

A warning has been issued to those who take food supplements containing high levels of caffeine following the death of a man.

followed by green tea and then black. But all have significant amounts of disease-fighting agents, antioxidants and caffeine. Avoid large consumption of caffeine if you're pregnant or have high ...

L-theanine is also present, in lower concentrations, in black tea. There’s less research on the effects of coffee on stress, but researchers have found moderate to high amounts of caffeine are ...

An 8-ounce cup of green or black tea contains 14-60 milligrams ... And the American College of Cardiology said this summer ...

Green tea may be especially healthy compared to other teas, partly because it undergoes little processing on the way to our cups. Black and oolong teas are fermented, a process that reduces their ...