As far as I know niacin and biotin are very good compounds for our hair development. I read some studies that the component of niacin is somewhat similar to Minoxidil but side effects are different. Since food supplements containing niacin and biotin doesnt harm our body.
It could be an alternative since this is merely a natural supplementation of our hair nourishment.
It says on there website that it has no side effects because all the contents are natural and chemical-free not like with propecia,