Green tea

Green tea is a type of tea that is made from Camellia sinensis leaves that have not undergone the same withering and oxidation process used to make oolong teas and black teas.

Theory
Regular green tea is 99.9% water, provides 1 Calorie per 100 mL serving, is devoid of significant nutrient content (table) and contains phytochemicals, such as polyphenols and caffeine. Polyphenols found in green tea include epigallocatechin gallate (EGCG), epicatechin gallate, epicatechins and flavanols,[1] which have antioxidant, anticarcinogen, anti-inflammatory, and anti-radiation biochemical effects in vitro.Other components include three kinds of flavonoids, known as kaempferol, quercetin, and myricetin.

Learn more
You can drink it as tea but it is also available as capsules.

It is used in the treatment regime against ME of Ms Voss to prevent the use of Raltegravir
 * My antiretroviral Regime for Antiretroviral Treatment of Myalgic Encephalomyelitis (Deutsch: #Arztanfragen - Mein Therapieregime für die antiretrovirale Behandlung bei Myalgischer Enzephalomyelitis)