Brittle Toenails Causes
Brittle toenails caused by: nutritional deficiency (biotin, iron, B12), fungal infection, frequent moisture changes, age-related changes, certain medical conditions (thyroid). Treatment: address underlying cause, biotin 5mg/day if deficient, gentle nail care.
Causes
Biotin deficiency, iron deficiency, B12 deficiency, fungal infection, frequent water exposure (washing hands), aging, thyroid disease. Test for deficiencies before supplementing.
FAQ
Does biotin help brittle nails?
If deficient — yes. 5mg/day.
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