Also known as: gamma-linolenic acid, GLA, evening primrose oil, borage oil, omega-6 fatty acid
Strongest in Consistency (89). Held back by Recency (42).
Solid mix of RCTs with some methodological gaps.
Good cross-study replication, some imprecision.
Thousands of participants across the literature.
Studies agree on direction of effect.
Evidence base skews older; field may have moved on.
No quantified outcomes yet. Once we have studies with measurable endpoints, you will see per-outcome magnitude here.
Areas where research points to a consistent direction of effect. The strength of evidence is graded; the size of the effect is not quantified.
Recommended: 15-30mg GLA daily (often combined with omega-3)
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