The current study aimed to examine the effects of oral consumption of evening primrose oil capsules on the sexual function of reproductive-aged women.

This trial was performed on 110 women. The study units were randomly divided into intervention and control groups. The intervention group received a 1000mg evening primrose oil capsule daily for eight weeks, and the control group received a 1000mg placebo capsule daily for the same time. Before the intervention, 4 and 8 weeks after the intervention, their sexual function was evaluated by the female sexual function index.

The mean total score of sexual function in the intervention group was significantly improved compared to pre-intervention (P<0.001) and the control group (P<0.001). There was a statistically significant difference in all dimensions of sexual function except pain compared to pre-intervention in the intervention group; however, between the two groups of intervention and control, only in the dimensions of orgasm (P=0.04) and sexual satisfaction (P=0.001) statistically significant differences were observed.

The results indicated that the consumption of evening primrose oil capsules can improve sexual function in women of reproductive age, particularly in orgasm and sexual satisfaction dimensions.