GNC L-Theanine 200mg: Promotes Relaxation* GNC L-Theanine 200mg is a dietary supplement that can help enhance relaxation. L-Theanine is an amino acid derived from black, white and especially green tea leaves. Just take one 200mg softgel capsule of GNC L-Theanine 200mg daily to remain calm and relaxed.* Brings relief from daily life* Offers calming support for PMS* Helps promote a sense of relaxation to cope with stress from everyday overwork and fatigue* Supports a restful, relaxed state* These statements have not been evaluated by the Food & Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.