The Dutch authority for nuclear safety and radiation protection (ANVS) issued a warning about ten products it found gave off harmful ionizing radiation. It urged people not to use the products, which could cause harm with long-term wear.
The products identified included an "Energy Armor" sleeping mask, bracelet and necklace. A bracelet for children, branded Magnetix Wellness, was also found to be emitting radiation.
"Don't wear it any more, put it away safely and wait for the return instructions," the ANVS said in a statement.
Sellers in the Netherlands known to the ANVS have been told that the sale is prohibited and must be stopped immediately and that they must inform their customers about this." The ANVS has published a full list of the products it identified as radioactive on its website.