Dose: 100-250mcg Frequency: Daily or every other day Timing: 30-60 minutes before bed Duration: 4-8 weeks, followed by 2-4 week break At these doses, most users report noticeable improvements in sleep onset, depth, and morning alertness
Zhou Z, Wu H, Yang R, Xu A, Zhang Q, Dong J, Qian C, Sun M
Prepared by FDA-registered, state-board-regulated pharmacies in ISO-classified cleanrooms
As of 2026, the paper has not been formally retracted, but the Expression of Concern remains in force
Check that your evening primrose oil doesnt contain any additional vitamins (such as vitamin A) because if you end up taking more than one capsule it could mean youre exceeding that vitamins daily recommended dose