TO RETAIN, practice. To engage the services of an attorney or counsellor to manage a cause, at which time it is usual to give him a fee, called the retaining fee. The act by which the attorney is authorized to act in the case is called a retainer.
One explanation for the difference in the levels of catechins found in this study and others is the type of samples used. In comparative studies, leaves of Camellia sinensis 4 Discussion Table 1. Levels of catechins and caffeine in tea bags, extract, and ready-to-drink green tea.
L-Theanine can be found in: The leaves of camellia sinensis (source of green tea catechins and the plant used to produce green, black, and white teas) at 0.9-3.1% of the dry weight of the leaves and said to range from 25-60mg per 200mL serving of tea (2.5g of dried tea leaves) C. japonica and C. sasanqua.