Activated charcoal soap has been shown to be highly beneficial in the treatment of acne. It not only aids the removal of toxins, but also removes skin impurities, and can even help reduce scars resulting from acne. At Earthen Myrra, we follow a traditional soap making technique call the Cold Process Method. It takes 4 weeks to cure. Usually all the soaps are made in small batches on regular basis to maintain the stock. Shelf life: 8 Months( its safe to use even after 8 months but since these are natural soap bars and are all scented with essential oils only, the fragrance fades away)