Comparison

100% Organic Spirulina 500 mg and 100% Organic Spirulina 500 mg

100% Organic Spirulina 500 mg (VSN Vital Strength Nutrition) lists 13 distinct ingredients and 100% Organic Spirulina 500 mg (VitaCeutical Labs) 21 (rows of one ingredient counted once); 12 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 0.62.

Amount per serving (and % of the Daily Value)
Ingredient100% Organic Spirulina 500 mg100% Organic Spirulina 500 mg
Vitamin B60.12 mg (7%)0.03 mg (2%)
Sodium25 mg25 mg
Vitamin B126 mcg (250%)6 mcg (250%)
Vitamin A6,900 IU6,900 IU
Riboflavin0.21 mg (16%)0.2 mg (15%)
Protein2 g2 g
Iron2.4 mg (13%)1 mg (6%)
Blue-Green Algae3,000 mg3,000 mg
Zeaxanthin2 mg2 mg
Gamma Linolenic Acid23 mg23 mg
Chlorophyll42 mg42 mg
C-Phycocyanin480 mg480 mg
Magnesium6 mg (1%)
Niacin0.5 mg (3%)
Potassium30 mg (under 1%)
Thiamin0.15 mg (13%)
Chromium4.5 mcg (13%)
Manganese0.05 mg (2%)
Iodine6 mcg (4%)
Vitamin K28 mcg (23%)
Inositol2 mg
Phosphorus24 mg (2%)

Amounts are per serving as DSLD gives them: 100% Organic Spirulina 500 mg, 6 tablets; 100% Organic Spirulina 500 mg, 6 tablets. Current labels entered April 2013 and November 2015. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own