Infrared Sauna Blankets for "Sweat Detox"

Portable infrared sauna blankets claim that sweating eliminates heavy metals, BPA, and environmental toxins through the skin. While trace amounts of heavy metals appear in sweat, a 2019 systematic review in Environment International found sweat contributes less than 1% of total toxic metal excretion. The kidneys and liver handle over 99% of detoxification, making sweat-based detox claims fundamentally misleading.