Building Strong Nails with Silica

I have a problem with weak, brittle nails. When I was researching one day, I learned that lack of silica in the diet could cause this. Oatstraw and horsetail both contain silica. So, when I brew up my overnight infusion of nettle or oatstraw I always add a pinch of horsetail. After about a month of consistently drinking this blend, I noticed that my nails have been a lot stronger. I've slacked off on this routine and now my nails are getting brittle again. So, I really do think that lack of silica was responsible for my problems.