L-Tryptophan 500 mg
L-Tryptophan 500 mg and 1 near-identical products are sold under 2 different brand names — a exact-twin Formula Twins cluster.
| Product | Brand |
|---|---|
| L-Tryptophan 500 mg | Source Naturals |
| L-Tryptophan Extra Strength 1500 mg | BRI Nutrition |
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