Use this calculator to plan how many Barlean’s Evening Primrose Oil 1300mg softgels and bottles you’ll need for a given time period, and see the estimated cost based on the current 120-count bottle price.
Evening Primrose Oil Dosage & Cost Calculator
Based on the labeled dose options for Barlean's Evening Primrose Oil 1300mg and the published 120-count bottle at $39.99.
Estimate only – based on the current listed price of the 120-count Barlean's Evening Primrose Oil 1300mg bottle. Actual Amazon price can change; check the live price before buying.
Why no height/weight input? Unlike per-kg supplements (creatine, protein), Evening Primrose Oil has no published bodyweight-adjusted dosing in the research behind it. This calculator doesn't fabricate a per-kg formula that doesn't exist in the literature.
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This product’s label dose is two 1,300 mg softgels daily, providing about 234 mg of GLA (gamma-linolenic acid) per serving.
It’s important to be direct about what the evidence actually shows: a Cochrane systematic review of 19 evening primrose oil trials (part of a larger 27-trial review covering both evening primrose and borage oil, 1,596 participants total) found no significant benefit for eczema symptoms compared to placebo [1]. Evening primrose oil is marketed for other uses (general skin, immune, and bone support, per this product’s own label) where the evidence base differs from the eczema-specific research summarized here — we’re citing the eczema review because it’s the most rigorously reviewed use case, not because it validates every claim on the label.
As with the other calculators on our network, there’s no published bodyweight-adjusted dosing for evening primrose oil, so this tool plans by a fixed daily amount rather than your height or weight.
References
- Oral Evening Primrose Oil and Borage Oil for Eczema (Cochrane Systematic Review). Cochrane Database of Systematic Reviews, 2013