by NOW Foods
L-Tryptophan is an essential amino acid that the body cannot produce and must be obtained from the diet. It serves as a precursor for serotonin (a neurotransmitter), melatonin (a neurohormone), and niacin (vitamin B3), supporting healthy sleep patterns, positive mood, and proper immune function.* Provides an essential amino acid Supports sleep health Promotes mood Helps with immune function *Discl
| Retailer | Size | Price (CAD) | Availability |
|---|---|---|---|
| Vitamart | $13.49 | In stock | |
| Body Energy Club | $15.99 | In stock |
Prices last synced on 2026-08-04. Confirm at the retailer before buying.