Using mayonnaise as a deep conditioner for healthy hair.
According to hairstylist Nathaniel Hawkins, this old-school method works because of the fat to protein ratio. "The oil softens the hair, making it shinier — and the protein in the eggs will make strands stronger." He recommends applying the treatment to dry hair, and leaving it on as a mask for 15-20 minutes. Shampoo twice, and condition afterwards. But, Hawkins notes, this treatment works best for hair that isn't fine or limp.