Compared with many herbal supplements and diet pills on today's market, the health benefits of green tea pills are well-documented. In fact, the health benefits of green tea have been praised for almost 1300 years, dating back to "The Book of Tea," written by Lu Yu in 780 AD. Modern scientific research backs up this ancient claim.

A study reported in the American Journal of Clinical Nutrition found that green tea extract helps with weight loss by revving up your metabolic rate by four percent in a 24-hour period. When large amounts of green tea were taken by study subjects before they exercised, the subjects burned more calories while exercising, compared with subjects who exercised but didn't drink green tea.

The increased fat burning shown in the study is attributed to a catechin polyphenol in green tea called EGCG. EGCG, epigallocatechin gallate, is a particularly powerful antioxidant. Antioxidants have been shown to play an effective role in the fight against cancer, since they combine with free radicals (damaged cells in the body) to stabilize them. It is possible that your body's fat oxidation rate and the rate at which your body burns calories are both revved up by the high concentration of catechin polyphenols found in green tea. But the weight loss effects of green tea don't stop there.

Green tea also helps with appetite suppression. A University of Chicago study showed that rats given green tea extract daily lost up to 21 percent of their body weight, consuming 60 percent less food after just seven days. This may be due to the catechins in green tea helping to regulate glucose, which slows the rise in your blood sugar level that takes place after you eat. This in turn prevents the accumulation of too much insulin and thus discourages fat storage.

Catechins may also inhibit the absorption rate of glucose into fat cells. Besides weight loss benefits, the EGCG in green tea has also been shown to prevent brain cell death in mice. This promising discovery may mean that green tea has research applications in the study of Alzheimer's disease and Parkinson's. Case Western Reserve University in Ohio research shows that the polyphenols in green tea also reduce the incidence and severity of rheumatoid arthritis. Another study finds green tea as effective as aspirin in preventing blood platelet clumping. This means that drinking green tea regularly could help prevent arterial hardening, improve circulation, and guard against high blood pressure and strokes. Traditional Chinese medicine includes green tea in pill form combined with a variety of other ingredients. This herbal medicine is promoted as a cure for congestion and head colds with body aches. The pill is supposed to be ingested while drinking green tea.

To achieve the maximum benefits described here, you would have to drink as many as five cups of green tea a day. However, there are a variety of Green Tea Pills available on the market, which may provide the same beneficial effects in a concentrated form.