What Those Vertical Ridges on Your Fingernails Might Be Telling You — Especially After 40

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Another common factor is lack of essential vitamins and minerals, especially:

  • Biotin (Vitamin B7)
  • Iron
  • Zinc
  • Magnesium

As we age, our bodies don’t absorb nutrients as efficiently. That means even if you’re eating well, you might still fall short in certain areas — and your nails could be one of the first places to show it.

If you’ve also been experiencing fatigue, thinning hair, or slow healing, it might be worth speaking to your doctor about possible deficiencies.

4. Underlying Health Conditions

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