PlainVitamins

fat

Evening Primrose oil supplements

Half of the 300 evening primrose oil supplements in the NIH label database that print an amount list 500 mg or less per serving; the middle half list 500 mg to 1,300 mg (DSLD version 9.4.0, January 2026). The 27 products whose only supplement ingredient is evening primrose oil list a median of 1,000 mg.

Products listing it
389300 print an amount; 88 list it inside a blend without an amount
Median per serving
500 mgmiddle half 500 mg to 1,300 mg

How much evening primrose oil do supplements contain?

The median product lists 500 mg per serving. One in ten lists 150 mg or less, one in ten 1,300 mg or more. The amount printed most often is 500 mg (88 products).

Products by amount of evening primrose oil per serving

300 products, log scale; extreme 0.2% at each end left out of the drawing.

Evening Primrose oil: products by amount per serving100 mg300 mg1,000 mg
Evening Primrose oil: products by amount per serving100 mg300 mg1,000 mg
Evening Primrose oil: products by amount per serving100 mg300 mg1,000 mg
Evening Primrose oil: products by amount per serving100 mg300 mg1,000 mg
Evening Primrose oil: products by amount per serving100 mg300 mg1,000 mg
The amounts printed most often
Amount per servingProductsFor example
500 mg88 Evening Primrose Oil 500 mg (Vitamin World); Evening Primrose Oil 500 mg (Nature's Bounty); Evening Primrose Oil 500 mg (VitaCeutical Labs)
1,300 mg72 Evening Primrose Oil 1300 mg (Vitamin World); Evening Primrose Oil 1300 mg (Viva Vitamins); Evening Primrose Oil 1,300 mg (VitaCeutical Labs)
1,000 mg47 Evening Primrose Oil 1000 mg (Sundown Naturals); Natural Evening Primrose Oil 500 mg (Windmill); Ultra Preventive V Plus Chel (Douglas Laboratories)
50 mg15 Glucosamine Chondroitin Wtih Tart Cherry (Nature's Answer); MultiNutrient (Bluebonnet Super Earth); MultiNutrient Iron Free (Bluebonnet Super Earth)
1,500 mg11 Evening Primrose Pearls 500 mg (Crystal Star); Evening Primrose Oil 500 mg (Mountain Meadow Herbs); Evening Primrose Oil 500 mcg (New Sun)
300 mg10 Phyto-Estrogen Formula (GNC Women's); Omega 3-6-9 (Indiana Botanic Gardens); Phytoestrogen Formula (GNC Women's)
200 mg8 Feminene Female Support Formula (Market America); Omega Burn (BioChem Sports); Vegepa (Igennus Healthcare Nutrition)
280 mg4 EFA Liquid Natural Orange Flavor (Genestra Brands); EFA Blend For Children (Nature's Way); EFA Blend for Kids (Nature's Way)
800 mg4 Omega Woman with Evening Primrose Oil (Nordic Naturals); Omega 3-6-9 Softgels (1200 mg) (BulkSupplements.com)
2,000 mg4 Evening Primrose Oil (Fairhaven Health); Evening Primrose Oil 2,000 mg (Nature's Truth); Evening Primrose Oil (Approved Science)

Source: Supplement Facts rows of every product's current label, NIH ODS Dietary Supplement Label Database version 9.4.0; amounts in one measure (weight).

Which products list the most evening primrose oil?

On-market products, per serving, with a plausible amount: the rule leaves out likely entry slips, such as an amount far beyond every other label with no %DV or strength on the label to back it (each product page still shows its own amount, marked).

Have the amounts changed over the years?

Products whose current label entered DSLD in 2012 list a median of 500 mg; those entered in 2024, 1,000 mg.

Median evening primrose oil per serving by the year the label entered DSLD (years with 20+ products)
YearProductsMedian per serving
201230500 mg
201721500 mg
2020271,000 mg
202139500 mg
202220500 mg
2023231,000 mg
2024241,000 mg

Source: DSLD label entry dates and amounts, current labels.

In which products and brands?

Products listing evening primrose oil by DSLD product type

Evening Primrose oil by product typeFat/Fatty Acid188Other Combinations78Botanical with Nutrients27Botanical6Single Vitamin and Mineral1
Evening Primrose oil by product typeFat/Fatty Acid188Other Combinations78Botanical with Nutrients27Botanical6Single Vitamin and Mineral1
Evening Primrose oil by product typeFat/Fatty Acid188Other Combinations78Botanical with Nutrients27Botanical6Single Vitamin and Mineral1
Evening Primrose oil by product typeFat/Fatty Acid188Other Combinations78Botanical with Nutrients27Botanical6Single Vitamin and Mineral1
Evening Primrose oil by product typeFat/Fatty Acid188Other Combinations78Botanical with Nutrients27Botanical6Single Vitamin and Mineral1

Brands listing it most: Nature's Way (9), Nature's Answer (8), Bluebonnet (7), OL Olympian Labs (6), Wonder Laboratories (6), Good 'N Natural (5), GNC Women's (5), Douglas Laboratories (5), DC (5), BulkSupplements.com (5).

Every product listing evening primrose oil

389 products, A to Z by name (page 8 of 8), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

Where next?