http://www.womenshealthmag.com/nutrition/the-best-tea-for-you
Black
What It Is
Leaves are exposed to the air and turn black due to oxidation. A stronger, more traditional taste.
What It Does
The majority of related research shows that the black brew significantly reduces heart attack, stroke, and death from cardiovascular disease in women. It may also help prevent clogged arteries, improve blood vessel functioning, and lower blood pressure — great reasons to drink to your heart's content. Six cups a day may also provide resistance to microbial infections and possibly tumors, while two cups has been shown to ward off urinary tract cancer. Black tea also contains enough fluoride to successfully fight cavities.
Try
Lipton's new Vanilla Caramel Truffle premium tea ($3.50 for 20 bags). Smells like dessert and tastes that way, too. The funnel-shaped tea bag means the leaves have room to expand in the hot water, resulting in a stronger, more flavorful cup.
Green
What It Is
Leaves are steamed or cooked prior to oxidation. A crisper but less powerful taste than black.
What It Does
Asian countries have lower rates of many cancers and a high consumption rate of green tea. Coincidence? No way: The chemicals in green tea have been shown to bond with and destroy cancer cells, and women who drank 10 or more cups a day had a 43 percent reduction in cancer risk. Drinking green tea may also slow the spread of breast cancer and protect smokers from lung cancer. More good news: An unknown component in the tea has lowered tissue fat levels in mice. People who drink five cups a day have a higher metabolic rate and burn more calories- up to 80 a day than non-tea drinkers.
Try
Ito En's Green Jasmine ($2 for 16.9 oz). Clean and light, this no-cal iced brew makes it easy to drink those five cups — three bottles will give you that and more.