Hair and Nails can be damaged together in many situations like
vitamin deficiencies ( e.g. Biotin deficiency ) and
Thyroid hormone imbalance.
First of all we need to check your Scalp and Hair properly to know the severity of Hair damage. Also we need to check Nails for type of damage and brittleness.
Next Steps
We need to do blood tests to detect the exact reason for Hair and Nail damage and treat the underlying cause.
Health Tips
Foods rich in Biotin like Walnuts, Peanuts, Egg yolk, Milk , Sweet potatoes will definitely help make Hair and Nails healthy.