Many years ago I read in a magazine that MSM is good for nails. As mine split very badly, I looked MSM up on the internet and couldn't see any reason why I should not give it a try. After a few months my nails were very much stronger. Several years later I was taking a few other pills and decided to cut out the MSM. A couple of months later my nails started to split so I am back on it with strong nails again.
I have noticed that the older I get, the longer the body mainenance takes! Excercises for achilles, exercises for bursitis, etc. etc.