Nails are one of the main indicators of nutritional quality: If they’ve become brittle and thin, it’s time to review your diet and add vitamins and minerals.
Brittle and splayed nails are usually caused by a lack of biotin and vitamins C and D. Vitamin C is responsible for the smoothness of the nail plate and its general condition.
This vitamin is involved in the formation of collagen amino acids, which contributes to the strength and proper and rapid growth of the nails. Vitamin C deficiency causes brittle, flaky nails and impaired nail growth.
Our body does not produce this vitamin, so external sources of vitamin C are needed. The most vitamin C-rich foods are: citrus fruits, bell peppers, tomatoes, leafy greens, rose hips, currants, sea buckthorn, strawberries, citrus fruits, blackcurrants, cranberries, tomatoes, cabbage, and apples.