Question: how much evening primrose oil for anxiety?
Answer: Even so, it's unclear how much EPO played a role, since a 2009 systematic review didn't find EPO helpful for PMS. How to use: For PMS, take 6 to 12 capsules (500 mg to 6,000 mg) one to four times daily for up to 10 months. Start with the smallest dose possible, and increase as needed to relieve symptoms.