Most commercial fingernail hardeners contain formaldehyde and/or other toxic chemicals that make nails stiffer so they flex less, but also weaker, so they are more apt to break. In addition to cancer and other potentially-serious medical risks, clinical studies have found that formaldehyde causes fingernails to become dry, brittle and then split over time.
A "beauty expert" I saw on TV a couple days ago recommended using garlic to harden nails. She said if someone puts crushed garlic in fingernail polish, lets it sit 24 to 48 hours, and then applies it to their nails it will make them harder than acrylic. I had never heard that before, but searched the web and found garlic being recommended and strongly endorsed for nail-hardening in several nail-care forums and also that garlic is now being included as an active ingredient in some commercial nail-hardening products. The forum posts I read said nothing about putting garlic in nail polish. They recommended cutting or crushing garlic and directly applying it to nails for ten-minutes or so.
I haven't tried garlic for nail hardening. I am just passing this on as a possible remedy for a common nylon-string-guitarist problem. I don't know whether, like formaldehyde, garlic causes nails to become dry, brittle and split over time. I also don't know what effect it might have on your love-life. Try this idea at your own risk!
-Bob
