Perfect Hair Health is the foremost online resource for hair loss. I haven't come across another source with so much unbiased, evidence-based information about hair loss in one place. The site allows a lay reader to help identify why they are losing hair and then create an action plan to fight it. From the book Rob wrote (and revised multiple times as new information surfaced) to the Ultimate Guides and the Forum / Community, Perfect Hair Health is a place where someone concerned about hair loss can come get the data without all the other nonsense that is characteristic of internet hair loss forums.