Well this product based on Aminexil has a credibility due to backing of company like L’Oreal. But the product is not tested according to FDA standard so no body can say that which one is better. But it is supposed to be working in the similar way as Minoxidil by increasing the the period of Hair Cycle. As for the safety also minimal data of credibility is available about Aminexil. Minoxidil is a FDA approved medication for prevention Hair Loss and has been well studied and its effects are well documented.