Brittle nails, medically known as onychoschizia when they peel in layers or onychorrhexis when they show vertical splits, happen when the nail plate loses moisture or flexibility. Research shows that nails are mostly made of keratin, a tough protein, and they naturally contain about 18% water for optimal strength – drop below 16%, and they become dry and prone to cracking.
Common everyday factors that weaken nails include:
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Nail fungal treatments
Nail growth supplements
Keratin boosting foods
