Nano gold is pure water containing nanoparticles of gold with a negative electrical charge. These ultra-small particles are elemental gold (not bound to another substance) and are easily absorbed into all the cells of the body. A uniquely produced demineralized water with monatomic, diatomic and nano-clusters of gold.  Produced with purified water containing 10ppm (parts-per-million) of negatively charged gold particles varying in size from 0.14 to 4 nano meters.  This precise ratio (particle size and ppm) is crucial for maximum absorption of the gold nano-clusters. The Health Factory packages their products in the highest quality dark violet glass bottles which allow only positive infrared and ultraviolet light to pass through, resulting in longer shelf life.