I’ve found that putting powdered collagen in my coffee (it’s tasteless) and my nails are so hard, I can’t even cut them myself. I have short hair and it’s very fine, but when I get it cut, they always tell me I have a lot of it. I really don’t know why, except for the collagen. Try it for a couple months. The rest of me is falling apart and I’m in pain 24/7, but I have tough nails. I really think it would help. 😊