Better living through chemistry?

Just saw an advert for some skin care stuff made by Olay, and they mentioned that it contains hyleronic acid. My first thought was "they're making that up."

Turns out they aren't, the stuff really exists. There's an apparent causational link between high levels of the stuff in your skin and malignant tumours, so why you would want more of the stuff on your skin is beyond me, but I'm not in the cosmetics business.