I wonder if it has formaldehyde in it? I use a Rimmels nail hardener that has formaldehyde in it. I bought one from an independent chemist years ago and when I tried to buy more it had been discontinued. But I managed to buy lots of it off the internet. I only use it on the end of my nails so I hope it isn’t too dangerous. I’ve never found anything else that works. Although Avon do some nail strengthening varnishes and their products are very good these days.
Ah dear - why does getting older equate to diminished brain power?


but some are still breaking very low down, despite using a clear strengthening varnish.