As we get older, many people notice their nails becoming thinner, more brittle, or developing ridges and splits. After 40, these changes are often linked to slower cell turnover, hormonal shifts, and reduced nutrient absorption. While nail aging is normal, what you eat can make a noticeable difference. A nutrient-rich diet helps your body build stronger, healthier nails from the inside out.

Below are key foods that support nail strength after 40 and why they matter.

1. Protein-Rich Foods: The Foundation of Strong Nails

Nails are made primarily of keratin, a type of protein. As we age, protein synthesis slows, making adequate intake even more important.

Best choices:

• Eggs
• Lean poultry
• Fish
• Greek yogurt
• Beans and lentils
• Aim to include protein in every meal. Without enough protein, nails may grow slowly, peel easily, or break.

2. Biotin-Rich Foods: For Thickness and Resilience

Biotin (vitamin B7) plays a critical role in keratin production. Low biotin levels are commonly linked to brittle nails, especially in adults over 40.

Foods high in biotin: