Hair restoration news – Azelaic acid hair loss treatment: does it really work for hair loss? Azelaic acid becomes a hot topic for hair loss when a clinical study shows that Azelaic acid when combined with zinc and vitamin B6 can act as a potent inhibitor of 5 alpha reductase activity. This is very welcoming news for those who are looking for an effective topical 5 alpha reductase inhibitor for hair loss. 5 alpha reductase is responsible for the conversion of testosterone to DHT which many believe is the main cause for androgenetic or pattern hair loss. Click Azelaic Acid Hair Loss Treatment to read about clinical study.