There is no medical evidence to suggest coconut oil promotes hair growth. Although it doesn't promote hair growth, coconut oil makes an excellent pre-shampoo conditioner that helps keep hair healthy.
Despite the hundreds of claims about coconut oil's benefits, growing hair isn't one of them. According to Healthline, if coconut oil did make hair grow faster and longer, many people would be bothered with long face and body hair, since many people use coconut oil as a moisturizer or tanning lotion.
Coconut oil is good for many things. It is an all-natural moisturizer and can help to alleviate symptoms of psoriasis and eczema.