technology"—also advertised under other names such as "quantum scalar energy", "volcanic lava energy", and "quantum science". These products are purportedly infused with minerals that generate negative ions and are marketed as having health benefits or as a means of improving emotional well-being. The U.S. Nuclear Regulatory Commission and various state agencies have cautioned that such products may contain radioactive material such as uranium and thorium to produce negative ions. Radioactivity levels of these products vary, with some products found to contain levels of radiation high enough to warrant increased regulatory control, such as requiring a radioactive materials license. A number of alleged "anti-5G protection" products such as necklaces also received regulatory warnings. While their radioactivity levels are low, vendor recommendation to wear them all the time on body may result in absorbed dose exceeding safe limits. See also Eben Byers Electrical quackery History of radiation therapy Magnet therapy Radium Girls Shoe-fitting fluoroscope Snake oil Negative ion products References External links L’histoire étonnante du Tho-Radia, by Thierry Lefebvre and Cécile Raynal Radioactive Quack Cures at the Museum of Oak Ridge Associated Universities