Put a dab of tea tree oil on blemishes. "The plant's antibacterial extracts disinfect skin and speed healing," says James Balch, M.D., co-author of Prescription for Nutritional Healing. Experts at the University of Rochester found this remedy to be as effective as benzoyl peroxide (the main ingredient in over-the-counter acne products), without causing the pesky skin irritations that commonly accompany OTC meds.