How much evening primrose should u take for roseaca?

Rosacea and herbs: Supplements: supplement with gamma-linolenic acid, which improves the health of the skin. Good sources include evening primrose oil and black currant oil. Take 500 mg twice a day of either, and expect to wait at least six to eight weeks to notice results. Anti-inflammatory herbs such as ginger and turmeric may also be effective; these can be added to foods and/or taken as supplements.