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Azelaic acid is a naturally occurring substance that studies have shown to inhibit 5-alpha-reductase in human skin. 5-alpha-reductase converts testosterone into dihydrotestostrone (DHT), accumulation of which in scalp is believed to be responsible for the male pattern hair loss. Inhibition of this enzyme by azelaic acid can reduce the concentration of DHT in scalp and therefore stimulate hair regrowth. Azelaic acid can be found in many prescription acne medications. Azelaic acid is added to minoxidil solutions in hair loss treatment products because it has different mechanism of action in preventing hair loss.

This is a looooong article about the world's NO.1 hair regrowth product Minoxidil .  For regular customers, it will be more than enough to just read the first part: 30 frequently asked questions about minoxidil (Minoxidil FAQ). If you want to be an expert on Minoxidil, you can read the second part, which is our professional minoxidil review that covers topics (1) how minoxidil was discovered; (2) how minoxidil works to grow hair; (3) How different concentration of minoxidil affect the effectiveness; (4) minoxidil side effects, etc, and more.

This is a looooong article about the world's second best selling hair loss treatment product Finasteride.  For regular customers, it will be more than enough to just read the 16 frequently asked questions about finasteride. If you want to be an expert on finasteride, you can read the second part, which is our professional finasteride review.

1. What is Finasteride?

Retinoic acid,  also called tretinoin or all-trans-retinoic acid , is a vitamin A derivative.  It is mixed with Minoxidil and offered by some hair loss clinics to treat hair loss. Here we answer the top 10 questions you may have when considering using retinoic acid.

1. What is Retinoic acid?

In a study that was published in The Journal of Sexual Medicine. in 2007 (4(6):1708-12. Epub 2007 Jul 26. ), it showed the people who are informed about possible side effects of 5mg finasteride reported significant higher rate of side effects than those who were not informed, which suggests a lot of people who have side of effects from using finasteride may not come from the drug itself, rather it is a  result of nocebo effect.