When I was about 14, I suffered from terrible split nails, teenage hormones playing havoc with my attempts to grow them into anything other than flakey stumps. Someone told me to eat two jelly cubes a day for three months and it would cure the flaking, so I tried it and from then on I had nails I could un do screws with, such was their strength.
All was well for decades, then came the menopause and my nails reverted to splitting again. I tired all the fancy nail oils, creams and varnishes and although they made my nails look and feel lovely, nothing cured the splitting. So I thought I’d give the jelly a go again. Two cubes daily for there months. Guess what? It worked, I now have nails of steel again. I have no idea of the science behind this, or even if there IS science behind it, but since jelly is pretty cheap, you might want to give its go. Just sayin’.