Comparison

Spirulina and 100% Organic Spirulina 500 mg

Spirulina (ZHOU) lists 7 distinct ingredients and 100% Organic Spirulina 500 mg (VSN Vital Strength Nutrition) 13 (rows of one ingredient counted once); 6 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 0.59.

Amount per serving (and % of the Daily Value)
IngredientSpirulina100% Organic Spirulina 500 mg
Protein2 g2 g
Blue-Green Algae3,000 mg3,000 mg
Zeaxanthin2.9 mg2 mg
Gamma Linolenic Acid30 mg23 mg
Chlorophyll30 mg42 mg
C-Phycocyanin185 mg480 mg
Vitamin B60.12 mg (7%)
Sodium25 mg
Vitamin B126 mcg (250%)
Vitamin A6,900 IU
Riboflavin0.21 mg (16%)
Thiamin0.15 mg (13%)
Iron2.4 mg (13%)
Carotenoids11 mg

Amounts are per serving as DSLD gives them: Spirulina, 6 tablets; 100% Organic Spirulina 500 mg, 6 tablets. Current labels entered May 2021 and April 2013. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own