Everything DoseRank tracks on the evening primrose oil shelf — Gamma-Linolenic Acid (GLA). The category itself is never ranked: 67 products get scored the moment you say what you want them to do.
How to read the scores
This legend covers the scores on this page — for data sources, scoring weights, and limits, read the full methodology →
Answer a few questions about your goals, habits, stack, and budget. Then, DoseRank will find the products that best match your needs based on your answers. It's free and only takes 60 seconds! No account is required.
A saved, shareable breakdown: your matched products, dose math, interaction flags to discuss with a clinician, and a price-tracked stack you can revisit.
Questions
Each product gets a composite score blending clinical strength, evidence, dose fit, trust and value — computed for the goal you picked, across this category's products. The #1 on the DoseRank tab has the highest composite; the other tabs re-rank the same products by Value, Trust, or Popularity. Placement is never paid.
Start with a goal, not a brand
Browsing evening primrose oil supplements without a goal makes no sense — different products do different jobs, and “best” flips depending on which job you're hiring for. These are the 40 health outcomes that matter for this category. Pick yours, and the full evidence-ranked shelf loads for that goal alone.
Eczema severityOverall clinical burden of eczema.50 rankedLimited
Essential fatty acid statusAdequacy of physiologically necessary fatty acids.51 rankedStrong
Skin hydrationMoisture content or hydration of the skin.67 rankedModerate-strong
Hot flashesEpisodes of sudden heat sensation commonly related to menopause.58 rankedModerate-strong
Premenstrual symptom severityBurden of PMS-related mood or physical symptoms.67 rankedStrong
Neuropathy symptomsPain, numbness, or dysfunction due to peripheral nerve problems.67 rankedModerate-strong
Skin barrier functionProtective integrity of the outer skin barrier.33 rankedModerate-strong
IrritabilityLow threshold for frustration or anger.2 rankedStrong
Menopausal symptom severityBurden of symptoms such as hot flashes and sleep disturbance.3 rankedModerate-strong
Blood pressureArterial pressure; direction of benefit depends on baseline status.31 rankedModerate-strong
Aspartate aminotransferase (AST)Enzyme used to assess liver and muscle injury.1 rankedStrong
CortisolStress-related glucocorticoid hormone level.1 rankedStrong
Intestinal permeabilityBarrier integrity and leakiness of the gut lining.1 rankedModerate-strong
Female fertilityAbility to conceive through female reproductive capacity.1 rankedLimited
Congenital anomalyStructural or functional birth defect.2 rankedStrongNothing is ranked yet — the shelf stays locked until you pick a goal.
No goal, no ranking.
A “best evening primrose oil supplement” list without a goal would be marketing, not evidence. Pick what you want to improve and DoseRank scores all 67 products against that goal's trials.