Let me start by saying I'm a licensed hair dresser. I specialize in mens hair and have researched this brand and shampoo quite a bit. I personally have multiple clients who use this and see results as well as a few other stylists at our store. I strongly believe that this product is amazing, dont be fooled tho, this IS NOT AN OVERNIGHT FIX-ALL! This is a conditioner that will fight against the dht buildup in your hair follicles to purge the buildup and dead follicles and REGROW healthy hair. In order to see results for this product you MUST- 1 use this shampoo every other day for atleast 3 months followed by the conditioner for best results[The product continues to work for 48 hours after application and a hairs life cycle is 3 months long so you're unlikely to see results before then.] And 2, you MUST LEAVE ON THE SCALP for atleast 5 minutes! The product takes about that long to go from the base of your scalp into the hair follicles and start working. If you wanna see results sooner, try using the shampoo and conditioner! We always reccomend to take a picture the first time you use it and don't look at the pictures for atleast 4 months. I've had lots of clients GROW BACK FULLER HAIR and more of it! Plus after getting covid myself I tried it because I was loosing hair by the handfuls and noticed it decreased the amount I was loosing! Definitely worth trying but ONLY if you're gunna be consistent [every other day for 5 minutes for atleast 3 months]. If you're not gunna be patient, don't bother. Good things come to those who wait ;)