Formaldehyde cross-links nail keratin into something genuinely harder — and then brittler, and then shattering — which is why the product that fixed the problem sells best to the people it created.
Cross-linking a brittle nail plate makes it harder — and a harder brittle nail snaps rather than bends, which is the exact opposite of what the bottle promised.
Hands take more water, more surfactant and more friction than any other skin you own — and the intervention that fixes them takes about ten seconds nobody spends.
The lamp that cures your gels emits real UVA onto the one patch of skin you never protect — and while the cancer risk is small, the thirty-second fix is one almost nobody bothers with.
Products, answers, therapy guides, tools and articles in one search. Brand names,
slang and abbreviations all work — accutane finds isotretinoin, bacne finds truncal acne.