If you see it again, please report it as an inappropriate ad. I'm pretty sure it's one of the products they don't want advertised here, but the ads are controlled by a vendor that doesn't catch everything.
It doesn't work, and more importantly, it uses a sneaky marketing system where you think you're getting a "free trial" but it's really a VERY short-term guarantee. You have to send it back within 30 days to get the purchase price refunded (but you still have to pay for the shipping both ways), and the 30 days start when you ORDER it, not when you get it. Meanwhile, they've signed you up for an auto-ship program, so they charge your card and ship out the second month (at a much higher price) before you've even really had time to try it.
It's a rip-off, but if you want to try it, they do sell it at Costco and in a few drugstores now. Get it that way instead of from a website and at least you can quit paying for it when you want.