Ceramic fiber products can affect human health primarily through inhalation of fibers, which can cause respiratory issues. Long-term exposure may lead to lung diseases such as fibrosis. Some types of ceramic fibers are classified as potentially carcinogenic to humans by the International Agency for Research on Cancer (IARC). Proper handling, including the use of personal protective equipment (PPE), and controlling exposure levels are crucial to minimize health risks. It's important to note that the health effects can vary depending on the type of ceramic fiber and the duration and intensity of exposure.