Is ringworm treatable with natural products such as mangosteen or nutmeg powder?

Tea Tree Oil: I'm not sure about mangosteen or nutmeg powder for ringworm, but tea tree oil has been shown to help cure athlete's foot nearly as well as a prescription cream. You'd want to apply it twice daily for at least 2 weeks and be sure to keep the skin clean and dry. I would only try this on the body or feet for a few weeks, not the scalp; if not better, you should see your doctor.