Vertical Nail Ridges After 40: Quick Facts

Thin vertical lines on nails are common with age and usually harmless.

Main Causes:

• Aging: Slower keratin production.
• Dryness: Nails lose moisture over time.
• Nutrient Gaps: Low biotin, iron, or zinc.
• Health Issues: Thyroid problems, poor circulation, arthritis.

See a Doctor If:

• Nails change color (especially dark lines)
• They split, thicken, or hurt

Care Tips:

• Moisturize nails
• Stay hydrated
• Eat nutrient-rich foods
• Use gentle nail care
• Consider biotin (with doctor’s advice)

Ridges are often normal — just watch for unusual changes.