L-METHIONINE by Douglas LabsL-Methionine 500 mg capsule.L-Methionine supplies 500 mg of this essential amino acid.

L-THEANINE by Douglas LabsPromotes a feeling of calmness.L-Theanine supplies 100 mg of pure L-theanine in each vegetarian capsule. L-Theanine is an amino acid that may promote a sense of calmness.

L-TRYPTOPHAN by Douglas LabsL-Tryptophan is an essential amino acid and a precursor for the synthesis of serotonin. Tryptophan crosses the blood-brain barrier and is converted to...

L-GLUTAMINE by Douglas LabsL-Glutamine 500 mg capsule.L-Glutamine 500 mg capsules contain 500 mg of pure crystalline L-glutamine.