Good dietary sources of biotin include:
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:
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:
Oysters
Beef
Cashews
Sunflower seeds
Whole grains
Because the body does not store zinc efficiently, consistent intake is important.
5. Omega-3 Fatty Acids: Improving Moisture and Flexibility
Dry, brittle nails can make ridges more noticeable. Omega-3 fatty acids help support nail bed hydration and reduce inflammation.
Add these sources:
Fatty fish (salmon, sardines, mackerel)
Chia seeds
Flaxseeds
Walnuts
Healthy fats also improve circulation, delivering nutrients more effectively to the nail matrix.
