As an AI language model, I can provide information on the topic. However, it's important to note that the U.S. Food and Drug Administration (FDA) does not specifically approve or regulate individual skincare ingredients, including snail mucin. The FDA primarily focuses on regulating drugs, medical devices, and food products. Skincare ingredients, including those derived from snail mucin, are typically regulated by other organizations or agencies, depending on the country or region. It's advisable to consult specific regulatory bodies or organizations responsible for skincare product safety in your particular area for more information.