Green tea has been used as a medicine by the Chinese for a long time. It has been used for treating body aches, headaches, and also for improving the metabolism rate. In order to remain healthy, Chinese follow the green tea diet, which is a rich source of polyphenols and EGCG (an antioxidant). It also fights free radicals and pro-oxidants. The antioxidants present in the tea protect the system from digestive ailments and respiratory infections, and destroy carcinogens and bacteria. This diet helps reduce the cholesterol level, and improves the rate of metabolism, thereby helping the dieter lose weight in a safe manner. Types of Extracts Strong Infusion: In case of strong infusions, the leaves are first soaked in an aqueous solution of alcohol, and then processed. Soft Extract: In order to obtain the soft extract, the strong infusion is concentrated further. Dry Extract: It is obtained after concentrating strong infusions to 40 to 50 % of solids, after which it is dehydrated. The remnants are further processed, and the final element obtained is a powder, which can be used for a variety of treatment purposes. Partially Purified Extract: A partially purified extract is obtained after the dry extracts are purified further, with the help of processes like column chromatography, solvent extraction, etc. Information on the Extract Diet The extract is a chemical composition of many things which are complex, and consists of almost 200 bio-active compounds. However, there are three main compounds called catechins, theanine, and caffeine. The extract should not be consumed in excess. It is important to follow the manufacturer's instructions for the right dosage. Proper care should be taken during the intake of dietary supplements, as the tea extract is not the same as tea beverage. On an average, one can drink 3 cups of tea every day. Three cups of tea contain 300 milligrams of catechins. A normal person can consume 300 - 600 milligrams of catechins per day without any kind of adverse effects on the body. There are also different diet pills of the same, available in the market, which are also used in the treatment of a number of side effects. Side Effects Mostly, they do not cause any adverse effects. However, at times, the caffeine present in it might cause harmful effects, especially in the case of pregnant women. Hence, it is recommended to consult a medical practitioner before their consumption. A planned green tea diet can surely help you stay fit. However, one must also make other lifestyle-related changes that include following an exercise regimen and refraining from smoking and excessive consumption of alcohol. Disclaimer: This article is for informative purposes only and does not in any way attempt to replace the advice offered by an expert on the subject.