NATURALLY SOURCED AMINO ACID: L-Theanine is a naturally occurring amino acid sourced from Camellia sinensis, the plant used to produce green, black, and white tea. The tea leaves are carefully processed to isolate it in its original form. WeightWorld’s L-Theanine capsules are a mindful choice for those looking to incorporate a relaxation regimen into everyday life. ADDED BLACK PEPPER & VITAMIN B6: WeightWorld’s L-Theanine capsules also contain black pepper extract and vitamin B6. Piperine, the active compound in black pepper, helps with better absorption. Vitamin B6 contributes to normal psychological function. Vitamin B6 contributes to the reduction of tiredness and fatigue. Vitamin B6 contributes to the regulation of hormonal activity. Vitamin B6 contributes to normal functioning of the nervous system (EFSA Claims).