https://blogs.mercola.com:443/sites/vitalvotes/archive/2025/11/24/could-your-hair-help-repair-tooth-enamel.aspxA new lab study suggests that a protein found in human hair may someday help repair weakened tooth enamel. Researchers tested keratin — a structural protein found in hair, skin and nails — and found that it could form a crystal-like coatingenCommunityServer 2008.5 SP1 (Debug Build: 31106.3070)