Comparison
L-Tryptophan 500 mg and Best L-Tryptophan 500 mg
L-Tryptophan 500 mg (Advanced Nutrition by Zahler) lists 2 distinct ingredients and Best L-Tryptophan 500 mg (Doctor's Best) 3 (rows of one ingredient counted once); 2 are on both labels. On the site's similarity measure, which compares ingredient lists (1 for the same list, rarer ingredients counting for more; amounts are not part of it), the two formulas score 0.78.
| Ingredient | L-Tryptophan 500 mg | Best L-Tryptophan 500 mg |
|---|---|---|
| Niacin | 8.3 mg (52%) | 20 mg (125%) |
| Tryptophan | 500 mg | 500 mg |
| Vitamin B6 | 10 mg (588%) |
Amounts are per serving as DSLD gives them: L-Tryptophan 500 mg, 1 capsule; Best L-Tryptophan 500 mg, 1 capsule. Current labels entered April 2022 and September 2013. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.
Each product on its own
- L-Tryptophan 500 mgAdvanced Nutrition by Zahler: every row against all products listing it
- Best L-Tryptophan 500 mgDoctor's Best: every row against all products listing it