L-tryptophan is an essential amino acid that the body cannot produce so it needs to be obtained by dietary means. It serves as a precursor to the neurotransmitter serotonin, which helps to promote feelings of comfort and security and to regulate appetite and sleep cycles.* Protocol For Life Balance® L-tryptophan is thoroughly tested to ensure it is free of Peak E and other microbial impurities.

• Encourages Positive Mood*
• Supports Relaxation & Restful Sleep*