Swanson ® Suntheanine ® L-Theanine is a food supplement designed to supplement the daily diet of adults. The formula contains L-theanine enclosed in capsules whose shell is made of vegetable material without additives of animal origin. Thanks to this, the preparation can also be successfully used by vegetarians. What is L-theanine? Theanine is an organic chemical compound belonging to the group of non-protein amino acids. L-theanine does not occur in dietary proteins, but can be found in, among others: green tea leaves. The patented theanine Suntheanine ® was used in the production of the Swanson ® brand preparation in an amount of 100 mg per capsule. L-Theanine Suntheanine ® Swanson ® Brain and Nervous System Health is just 1-2 L-theanine vegetarian capsules per day. A 60-pack will provide up to two months of daily supplementation.