Review on Portable Amethyst Lake Hot Stones Massage Heater Bag Kit, 16 Basalt Hot Stone Warmer Set, Ideal for Salon and Home Use, Includes Zipped Inner Bag for Hygienic Transportation and Car Adapter by Shauna Bishop

These people may have developed a pretty good stone heating product, but it's overpriced. The e-book is not accurate on Chinese medicine concepts. They do not distinguish their yin from their yang. Yin is black and earth energy while white is yang and spiritual energy. You have misunderstood and misunderstood the basics for several concepts of heat/cold. Example: Thermal energy in the abdomen does not slow down metabolic processes, but speeds them up and opens them up. Cold, of course, slows everything down, including bowel movements. They mislead you; and it can be very dangerous when administered to humans. Do not follow the instructions of Chinese medicine! Turn to an authentic Chinese medicine source for advice. Many massage therapists confuse these concepts.