Eggs (fully cooked)
Almonds and walnuts
Sweet potatoes
Spinach
Salmon
Biotin supports keratin structure, helping nails grow thicker and less prone to ridging caused by fragility.
3. Iron: Preventing Weak or Grooved Nails
Iron deficiency can lead to thin nails and, in more severe cases, spoon-shaped nails (koilonychia). While vertical ridges alone don’t automatically mean iron deficiency, persistent weakness or fatigue alongside nail changes may be worth discussing with a healthcare provider.
Iron-rich foods include:
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Lean red meat
Chicken thighs
Lentils
Chickpeas
Pumpkin seeds
Dark leafy greens
Pair plant-based iron sources with vitamin C–rich foods like citrus fruits or bell peppers to improve absorption.
4. Zinc: Supporting Growth and Repair
Zinc plays an essential role in cell growth and repair. A deficiency may contribute to nail abnormalities, including ridges or white spots.
Include foods such as:
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