Has anyone ever recommended you rub vitamin E or aloe on a scar to help it heal? There isn’t much scientific evidence to back up the efficacy of these substances, but doctors think the anecdotal results owe to the act of rubbing itself, which helps collagen reform at the damaged site. If you have a scar, massage it twice a day to stimulate collagen production—oil and lotion optional.

READ MORE: 8 Ways to Get Rid of Scars