2. Biotin (Vitamin B7): The Nail-Strengthening Nutrient

Biotin is one of the most well-known nutrients for nail health. Studies suggest that biotin supplementation may improve brittle nails, but many people can get enough from food alone.

Good dietary sources of biotin include:

• Eggs (fully cooked)
• Almonds and walnuts
• Sweet potatoes
• Spinach
• Salmon
  
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