Dr. Bronner's Tea Tree Pure-Castile Soap is our phenomenal new soap for the millennium. The therapeutic benefits of Tea Tree Oil can now be reaped in our unsurpassed pure-castile base. Use for facial cleansing and cleaning minor cuts and scrapes, as well as everyday bathing. . Unlike most commercial soapmakers who distill the glycerin out of their soaps to sell, we retain it in our soap for its superb moisturizing qualities. We also superfat our soap with olive fatty acid, which both ensures that there is no free alkali, and lowers the pH, making a milder, smoother lather. We use rosemary extract and plant-derived vitamin antioxidants to protect freshness (the rosemary is effective at 0.005%, so it contributes absolutely no scent). . .