No Benefit evidenceother
Evening Primrose Oil for Hot Flashes
Gamma-linolenic acid (GLA), the active fatty acid in evening primrose oil, is thought to influence prostaglandin pathways involved in blood vessel dilation, but a specific hot-flash mechanism has not been established.
How strong is the research?
No Benefit evidence
Dietary supplements and herbal remedies as a category are 'not recommended' for vasomotor symptoms (Level I-II); evening primrose oil is not named as a specific exception.
How much to take
500–1000 mg