I take biotin 5mg and primrose oil 2 pills each has 160 mg of GLA - you need to look for gla. Aldo they say it is dht that you need to block so your hair does not fall out.
Is it possible that the basic cause of your hair loss may be that your biologically active thyroid hormone levels may be too low? These hormones are Free T3 and Free T4. If you haven't been tested for these then that should be first priority.