Comparison guide
Which GLA oil should you take?
All three supply the same fatty acid, gamma-linolenic acid (GLA), in different concentrations. That difference matters less than it sounds, because GLA oils have not held up in trials for eczema, and the evidence for PMS and breast pain is weak.
The options, compared
| Option | Evidence | Best for | The honest note | |
|---|---|---|---|---|
| Evening Primrose Oil | Limited evidence | The default, if any | The best-studied GLA oil, and a Cochrane review of 27 trials found it no better than placebo for eczema; PMS, breast pain and hot flash data are weak. Avoid it in epilepsy and stop two weeks before surgery. | View |
| Borage Oil | Limited evidence | More GLA, no better results | Roughly triple the GLA of evening primrose oil, but it failed for eczema just the same. Unrefined oil can contain liver-toxic pyrrolizidine alkaloids, so buy only certified PA-free products. | View |
| Blackcurrant Seed Oil | Limited evidence | Little reason to choose it | Its own trial, in mothers and infants, found only a modest, unreplicated reduction in atopic dermatitis, and no randomized trial supports it for dry skin or joints. | View |
Our verdict
If you want to try a GLA oil, evening primrose oil is the cheapest and best-studied choice, but expect little: none of the three has held up for eczema or PMS. Borage's extra GLA buys nothing measurable and adds a pyrrolizidine-alkaloid risk, and all three may add to bleeding risk with anticoagulants.