What factors influence the growth and strength of a nail?

The growth and strength of a nail are influenced by several factors, including nutrition, overall health, and age. A diet rich in vitamins (like biotin and vitamin E) and minerals (such as zinc and iron) supports healthier nail growth. Additionally, underlying health conditions, such as thyroid issues or circulatory problems, can affect nail strength and growth rate. Environmental factors, like exposure to moisture and chemicals, also play a significant role in nail health.