What could cause gray hair in someone in their 20s?

Gray hair in someone in their 20s can be attributed to:

1. Nutrient Deficiencies: For instance, a deficiency in PABA (para-aminobenzoic acid) may contribute.

2. Genetics: Genetic predispositions can play a role.

3. Oxidative Stress: Excess hydrogen peroxide due to inadequate antioxidants.

4. Chronic Stress: Elevated cortisol levels from prolonged stress can significantly impact hair color.

Addressing these factors may help manage or reduce premature graying.