Comparison

Melatonin 3 mg and Multiphasic Melatonin-SR 1.8 mg

Melatonin 3 mg (ON Optimum Nutrition) lists 3 distinct ingredients and Multiphasic Melatonin-SR 1.8 mg (Cardiovascular Research) 3 (rows of one ingredient counted once); 3 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 1.00: the same ingredients, at the amounts in the table below.

Amount per serving (and % of the Daily Value)
IngredientMelatonin 3 mgMultiphasic Melatonin-SR 1.8 mg
Calcium72 mg (6%)53 mg (4%)
Phosphorus55 mg (4%)40 mg (3%)
Melatonin3 mg1.8 mg

Amounts are per serving as DSLD gives them: Melatonin 3 mg, 1 tablet; Multiphasic Melatonin-SR 1.8 mg, 1 tablet. Current labels entered March 2016 and March 2023. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own