7- Onion Juice
Onions contain a lot of good vitamins for hair growth. The great amount of sulfur boosts blood supply which stimulates the follicles. Applying onion juice directly on the scalp will fight hair thinning and make hair thicker.
You can try this hack by blending one purple onion with half a cup of water, then filtering the mixture using a cheesecloth to extract the juice. You can later on apply the juice and let is sit it for at least 30 minutes. Wash your hair and voilà.
Doing this will prevent hair loss, reverse the process of greying hair, treat dry, itchy scalp, and give you healthy hair in all.