Use hair mask made of aloe vera and egg.
Another hair mask is amla powder+lime juice(2:1), make a smooth paste . Apply this to the scalp and leave it on till it dries up. Rinse with shampoo , follow up with a conditioner.
Also if you are observing bald patches don't ignore it, do consult a doctor just to keep informed if everything is functioning right.
Eat nutrient dense food. You can take supplements but you must consult doctor before that to be sure of allergies , natural products can trigger allergies too.