I really don't know if it's a health risk or not but I kind of doubt it. Last year Alan & I were having a little prostate play session and I screwed up and grabbed a silicone lube and doused one of our Tantus silks with it. About 10 seconds later he tells me the toy is dragging like crazy and needs more lube. Well... no. What actually happened is that the surface of the toy had become really "gritty", for lack of a better word, with what seemed like sticky little balls of silicone. Anyhoo, the toy was a goner, but it all washed off of our skin with no more difficulty than the lube alone would have, and neither of us had any sort of reaction from it. That might not seem like a good base of evidence, but between Alan & I we've had reactions to most lubes on the market and several sex toy materials too, so I think if it was really toxic or something, then one of us would have at least had the standard rash or burning skin. less