This oil contains omega-6 and omega-3 essential fatty acids, which help provide moisture for your hair and encourage hair growth and strength. Specifically, the gamma-linolenic acid (GLA) in black currant seed oil is an omega-6 acid that can help prevent hair thinning, splitting and dryness, according to Dr. Andrew Weil.
Moisture is key for healthy hair because if your hair is dry and fragile, it will be more likely to break. Of course your hair will keep growing, but it will seem like it is not because it breaks before you see any real progress.
Omega-6 and omega-3 fatty acids are also beneficial in improving the condition of skin and nails.
Weil recommends starting with 500 mg capsules one to three times per day. The capsules are also available in higher dosages, but start with the lower dosage and gauge your reaction to the supplement. It is important to take GLA as a capsule (rather than trying to get an adequate amount solely through diet) because it can be challenging to get enough of the fatty acid to improve hair health. A supplement makes it much easier to get the recommended dosage.