14 Warning Signs of Vitamin Deficiencies You Can Spot in the Mirror

2. Brittle Hair and Nails Linked to Biotin Deficiency

Brittle hair and nails are often more than just cosmetic concerns; they can be a telltale sign of biotin deficiency. Biotin, also known as Vitamin B7, is crucial for the health of your hair, skin, and nails. Without sufficient biotin, you may notice your hair becoming dry and prone to breakage, while your nails may become thin and brittle. This deficiency is relatively rare but can occur in individuals who consume raw egg whites over an extended period, as they contain avidin, a protein that inhibits biotin absorption. Increasing your intake of biotin-rich foods like eggs, nuts, and whole grains can help restore strength and vitality to your hair and nails.