Comparison
Evening Primrose Oil 500 mg and Prim Royal-V Standardized Herbal Extract
Evening Primrose Oil 500 mg (Thompson) lists 3 distinct ingredients and Prim Royal-V Standardized Herbal Extract (Douglas Laboratories) 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.
| Ingredient | Evening Primrose Oil 500 mg | Prim Royal-V Standardized Herbal Extract |
|---|---|---|
| Linoleic Acid | not disclosed | 225 mg |
| Gamma Linolenic Acid | not disclosed | 30 mg |
| Evening Primrose oil | 500 mg | 500 mg |
Amounts are per serving as DSLD gives them: Evening Primrose Oil 500 mg, 1 softgel; Prim Royal-V Standardized Herbal Extract, 1 vegetarian capsule. Current labels entered August 2014 and June 2012. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.
Each product on its own
- Evening Primrose Oil 500 mgThompson: every row against all products listing it
- Prim Royal-V Standardized Herbal ExtractDouglas Laboratories: every row against all products listing it