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.
Healthy diet with more protein is beneficial for hair's. You can also try some essential oils having onion or black seed as ingredients. You can also try some home remedy like applying egg or onion mixture.
1. Oil your hair(Mustard oil or Coconut). My favourite is desi ghee. It's good for hair growth and also for dandruff.
2. Just soak sikakai powder overnight and make a paste in morning. You can wash your hair with that or apply it as a mask.It's best for hair thickening.
3. Once a week just wash your hair with curd. You will see the difference in few weeks