My fingernails are rubbish - if I so much as try to pick a bit of tape off the roll they start flaking and splitting. I've tried specific supplements at different times with mixed results. For example, a few years ago I tried a particular brand of Silicea (it was a bit pricey but had very good reviews) and after the two month period of waiting for my nails to grow out, it made a considerable difference. Improved my hair too. So I tried it again recently, kept it up for three months - no difference at all! Maybe I need to take more of it, but unfortunately that would make it unaffordable. I take a few general supplements every day, including zinc, but none of these have helped. If you have the same problem, what have you taken that has genuinely made a difference?