Why They Appear
The main cause is a natural decline in keratin production, which makes nails less smooth. Moisture loss also plays a role—dryness from aging, frequent hand-washing, or harsh cleaners can make ridges more visible.
Could It Be Nutritional?
Sometimes nail changes relate to low levels of:
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Biotin (B7) – supports keratin
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Iron – carries oxygen to cells
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Magnesium – aids cell repair
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Zinc – helps tissue growth
Deficiencies may cause weak, dull, or deeply ridged nails.
When to See a Doctor
Vertical ridges alone are harmless. But check with a professional if you notice:
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Yellow, blue, or brown discoloration
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Thickening, splitting, or crumbling
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Swelling or tenderness
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Sudden, dramatic texture changes
Rarely, nail changes can signal thyroid, circulation, or autoimmune issues.
Nail Care After 40
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Moisturize hands and cuticles daily
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Eat nutrient-rich foods
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Wear gloves for cleaning or gardening
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Trim gently and avoid over-buffing
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Limit acetone removers
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Consider supplements only with medical advice
Bottom line: Vertical ridges are usually a natural part of aging, but paying attention to changes can help you protect both your nail health and overall well-being.