I love this stuff. I'm on my second bottle and I swear my hair looks longer every day. I have thyroid issues and my hair has thinned a lot. I was taking regular Biotin but it doesnt work as well as this stuff. I follow a hypothyroid support page on FB and it mentioned silica for hair loss, and this is the only vitamin I've seen containing silica. My hair is already long but I want to grow another 4-6 inches. With these vitamins I may just reach that goal! People are commenting on how long my hair is getting. Highly recommended.

I bought this a gift for my Father a devout coin collector!! He loves it!!! It is a signed proof and it came well packaged and ready for his collection.

If I leave it in as long as they say, my teeth become sensitive. I leave in for 15 minutes and my teeth are white, but not overly sensitive.