Signs of Nutrient Deficiencies That Are Written All Over Your Face

2. Bad Hair

If your hair has seen many bad days being dry, brittle, and full of dandruff, you might have a Vitamin B7 (biotin) deficiency. Usually, people develop it when taking a lot of antibiotics which destroy the intestinal bacteria that synthesize biotin. How to improve – Eat more biotin-rich foods like mushrooms, egg yolks, and cauliflower.