Why is my hair receding?

Hi im 22 and i noticed my hairline receding. Ive used alot of gels and waxes, and my hair is damaged, its very brittle and breaks easily. ive always had a big forehead. anyways my dad is 54 and he has a full head of hair, thick also. my grandparents have hair, nobody from either parents side is bald. My nutrition diet isnt that good. so im wondering why is my hair receding?