I had a consult with him and I have his book. Some people dismiss him because he's a chiropractor and not an MD. However, all his information is science based and he has references to back it up. He also has osteoporosis himself so he has skin in the game. I found him much more helpful than my doctors who were simply too busy to thoroughly assess my situation and point me in the right direction. I did purchase his collagen and I have noticed a big difference in my nails-I've been able to grow long nails again! Is it helping my bones? I don't know. I haven't started any meds yet, but I feel more confident in the treatment plan I have going forward now. Best of luck to you!