Evening Primrose Oil

Research: 3/6Safety: 4/5$13/month

A cold-pressed oil from Oenothera biennis seeds providing gamma-linolenic acid (GLA) that influences prostaglandin synthesis and may modestly relieve premenstrual syndrome symptoms, psychological menopausal symptoms, and cyclical breast pain.

Also known as: EPO, GLA oil, Gamma-Linolenic Acid oil

Evidence Scores

Research Quality3/6 — Small Pilot Studies

Safety4/5 — Likely Safe / Minor Side Effects

Trust Index: 10/10Transparency Score

Purely Educational: Zero commission. Zero bias. Zero excuses.

100% Neutral— No affiliate links. We make $0 from this recommendation.

Recommended Dose

1-3g/day (1000-3000mg) evening primrose oil providing ~8-9% GLA

Health Outcome Impact

Menopause Support2/5

Menstrual Cycle & PMS Support2/5

Where to Buy

Monthly Cost:$13

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Research References

[1] pmc.ncbi.nlm.nih.gov [2] pmc.ncbi.nlm.nih.gov [3] pmc.ncbi.nlm.nih.gov

Research last reviewed: 2026-04-01

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