Rezola Growth First, let's talk about why your hair is oily. Many people have the misconception that oily hair results from oily scalp. Exactly the opposite is true; the oil glands in a dry scalp overproduce oil in an attempt to self-moisturize. Rezola Growth Reviews Peppermint is a wonder oil and is good for dry hair. promotes hair growth too, it's cooling action can relieve itching and very effective for greasy skin and hair as well.