Caffeine- The bitter, white crystalline xanthine alkaloid caffeine is found in tea, coffee, soft drinks, chocolates, pain relievers, and a variety of over the counter medications. It is a psychoactive stimulant drug that causes increased alertness by stimulating the central nervous system. For the same reason, many people feel more energetic after consuming it. It even elevates the mood but these effects do not last for long. The effects of caffeine usually last for about five to six hours, though caffeine sensitivity varies from person to person. It has been found that people who consume lot of caffeine on a daily basis soon develop less sensitivity and may need to increase their intake to enjoy the same effect. Being a diuretic, a person consuming caffeine may have to urinate more often.

Epicatechin Gallate is a type of flavonoid normally extracted from green tea and buckwheat. It is a flavan-3-ol with chemical formula C22H18O10 and Mol. Mass 442.37 g/mol. Research shows that Catechins including Epicatechin gallate have anti-inflammatory, antioxidant and free radical scavenging properties. Its effects are being studied on scar formation which showed a significant increase in blood vessel formation, inducible nitric oxide synthase and cyclooxygenase-2.. It also indicated a decrease in arginase-I activity and protein levels, which improved scars. The wound healing properties of Epicatechin gallate are also being studied on rats; preliminary research shows encouraging results.

Epichtechin is a type of flavonoid commonly found in cocoa. It is also present in teas, wine, chocolate and other fruits and vegetables. It is a strong antioxidant that can help prevent free radical damages to the cell. It may prevent cancer, premature aging, and cardio vascular diseases. Epicatechin works by elevating the nitric oxide in the blood which relaxes the blood vessels and improves blood flow which lowers the risks of stroke. It helps maintain blood pressure level. Epicatechin can also improve cardio vascular health. Epicatechin has the ability to mimic insulin and can also help regulate blood sugar levels.

Epigallocatechin or gallocatechol is a flavanol which are a class of flavanoids. Its basic structure is composed of the 2-phenyl-3, 4-dihydro-2H-chromen-3-ol skeleton. This chemical occurs naturally and is found in green tea and fruits like the pomegranate and persimmon. It is an antioxidant. The chemical interacts with the cannabinoid receptors at a moderate level. These receptors have important implications in human physiology. This means that their activation generates health benefits. Flavanols also act to protect against sunburns, increase capillary blood flow, decrease blood pressure and keep the walls of the arteries in a relaxed condition. The chemical may also act as a building block for other important chemical compounds like proanthocyanidins.

Epigallocatechin Gallate (EGCG) is among the major catechins found in green tea. It belongs to the class flavan 3 ol of flavonoids, and is polyphenolic matter. Black tea also contains EGCG but in lower quantities. Epigallocatechin gallate makes up about 30% of dry weight of the green tea leaves. EGCG is the most powerful antioxidant present in green tea. It helps to burn fat, increase metabolism, and lower the storage of fat. Researches show that EGCG can be beneficial in curing many types of cancers, like bladder, cervical, prostate, and brain cancer. It also builds up the immune system and protects the body from many diseases.

Green Tea Extract increases energy expenditure and affects fat oxidation, which therefore promotes weight loss by increasing the body's metabolism.