Comparison

Spirulina 500 mg and Formula 681

Spirulina 500 mg (Wonder Laboratories) lists 3 distinct ingredients and Formula 681 (DC) 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)
Ingredient	Spirulina 500 mg	Formula 681
Protein	0.3 g	0.3 g
Blue-Green Algae	500 mg	500 mg
Chlorophyll	30 mg	30 mg

Amounts are per serving as DSLD gives them: Spirulina 500 mg, 1 capsule; Formula 681, 1 capsule. Current labels entered December 2021 and June 2022. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own

Spirulina 500 mgWonder Laboratories: every row against all products listing it
Formula 681DC: every row against all products listing it