... tourmaline, germanium, elvan, and volcanic rocks. This pillow adopts 49pcs of tourmaline stones Tourmaline emits about 2. ... brain blood vesseldiseases, diabetes, arthritis, tumor etc. Balance body pH value, improveimmunity, complimentary treatment of various diseases, ... electromagnetic wave, water pulseand other harmful radiation to the body. Good for those; Nervous system : Having headache, ...