Comparison

All Natural Evening Primrose Oil and Evening Primrose Oil 500 mg

All Natural Evening Primrose Oil (OL Olympian Labs) lists 5 distinct ingredients and Evening Primrose Oil 500 mg (Vitabase) 5 (rows of one ingredient counted once); 4 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 0.69.

Amount per serving (and % of the Daily Value)
IngredientAll Natural Evening Primrose OilEvening Primrose Oil 500 mg
Oleic Acid27 mg35 mg
Gamma Linolenic Acid50 mg45 mg
Evening Primrose oil500 mg500 mg
Palmitic Acid26 mg30 mg
Linoleic Acid350 mg
Alpha-Linolenic Acid325 mg

Amounts are per serving as DSLD gives them: All Natural Evening Primrose Oil, 1 softgel; Evening Primrose Oil 500 mg, 1 softgel. Current labels entered June 2012 and March 2012. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own