Let me start by saying I spent tons of money with collagen coz I always wanted something to help my hair and skin as I'm afraid I would look bad starting 40s. Finally! I found something that works! Within a week of using this my hair feels thicker and stronger and it's growing faster than usual. I see the same thing with my nails, I need to cut my nail twice a week which I only would do once a month before!!! Worth every penny!!! Thanks