What is Green Tea?
- – Tea, Camellia Sinensis, has different names according to their manufacturing process, including ‘non-fermented’ green tea, ‘semi-fermented’ oolong tea and ‘fermented’ black and red (Pu-Erh) teas. Originating from China, tea has been one of the most common beverages in the past 2000 years. Green tea has a long history use both as a medicine and a healthful beverage. In China, Green tea has been widely used in traditional Chinese medicine for headaches, body aches and pains, digestion, to prolong life. There are three main components in green tea leaves act upon human health which are xanthic bases(caffeine and theophylline), essential oils and especially, polyphenolic compounds as strong antioxidants and present important biological properties.
Function? – Healthy body weight
- – Studies have shown that green tea extract (not only its caffeine component) can promote fat oxidation in human body , which can help with weight loss to maintain healthy body weight.
- – One of the studies have found that EGCG in green tea extract can increase substrate use efficiency in cell level by modulating cellular signalling pathways, which can result in improvements in exercise output.
- –  Cabrera, Carmen, et al. “Beneficial Effects of Green Tea—A Review.” Journal of the American College of Nutrition, vol. 25, no. 2, 2006, pp. 79–99., doi:10.1080/07315724.2006.10719518.
- –  Dulloo, Abdul G, et al. “Efficacy of a Green Tea Extract Rich in Catechin Polyphenols and Caffeine in Increasing 24-h Energy Expenditure and Fat Oxidation in Humans.” The American Journal of Clinical Nutrition, vol. 70, no. 6, Jan. 1999, pp. 1040–1045., doi:10.1093/ajcn/70.6.1040.
- – Roberts, Justin D, et al. “The Effect of a Decaffeinated Green Tea Extract Formula on Fat Oxidation, Body Composition and Exercise Performance.” Journal of the International Society of Sports Nutrition, vol. 12, no. 1, 2015, p. 1., doi:10.1186/s12970-014-0062-7.