Do the estrogenic effects of tea tree oil get absorbed through the skin?
Concern has been raised about a “possible link between gynecomastia, topical lavender, and tea tree oil.” As I discuss in my video Does Tea Tree Oil Have Hormonal Side Effects?, gynecomastia is the abnormal development of breast tissue. (You can see a photo at 0:14 in my video.) You may recall that I’ve talked about lavender before, but what about tea tree oil?
It all started with a case series published in The New England Journal of Medicine. The researchers described three young boys in whom breast growth “coincided with the topical application of products that contained lavender and tea tree oils.” How do we know the products were to blame? “Gynecomastia resolved in each patient shortly after the use of products containing these oils was discontinued. Furthermore, studies in human cell lines indicated that