This is the very first product I have chosen to review for the benefit of the iHerb.com community, including myself. The reason I am writing it is because I am concerned that either iHerb.com or The Pure Guild will quit supplying this unique product line if nobody steps up to the plate in this community to report how pure, how non-toxic, and how effective it really is at reducing hair loss and helping to encourage hair re-growth! This product has been out of stock since after only the 2nd time I re-ordered it sometime back in the early spring! I can tell you that within the first week I began using the Hair Re-Growth shampoo, I would estimate that my hair loss in my de-tangling brush was somewhere between 1/3 to 1/2 less! That is an amazing improvement compared to any other shampoo I have ever tried. Please also go check out every ingredient in this formula with the Environmental Working Group Skin Deep database: There is not one single toxic ingredient in this formula--no sulfates, no parabens, no mono-, di-, or triethylamines, no quaternary ammonium compounds, ethoxylated detergents, and no toxic preservatives. This is clean, pure and effective. Also, I use astaxanthin as an additional DHT (dihydrotestosterone) blocker to boost the hair loss prevention power of this lupinus albus extract and seaweed based shampoo that I love so much. I definitely did NOT notice any "synthetic" smell to the natural essential oils that give this shampoo such a bright, clean fragrance.