The US Food and Drug Administration has expanded its warning about hand sanitizers to avoid, with the list now topping 100. The agency first warned consumers in June about hand sanitizers containing methanol, which can be toxic when absorbed through the skin and potentially deadly if ingested. Since then, several such products have been recalled by manufacturers and pulled from store shelves. Now, the FDA is also warning about hand sanitizers containing insufficient levels of alcohol. "FDA test results show certain hand sanitizers have concerningly low levels of ethyl alcohol or isopropyl alcohol, which are active ingredients in hand sanitizer products," the agency said in its updated warning on July 31. Nearly all of the hand sanitizers on the FDA's list were manufactured in Mexico. The agency has recommended recalls for most of the products, and has also issued import alerts to halt them from entering the country.