Honey, olive oil, and cinnamon are an old folk remedy for growing hair. There is evidence it helps with itchy scalp and scaling. You don’t eat it, you rub it into your scalp.
Warm ½ C olive oil and add 2 tablespoons of honey and cinnamon (each). Beat in an egg and comb the mix into your wet hair. Let it sit for 10 minutes and shampoo. Don’t make the oil too hot, or you will cook the egg.