An ad on my friend's local Facebook page:
IM LOOKING FOR 8 PEOPLE TO TRIAL UK’s strongest legal liquid fat burner 🚀 10 DAY TRIAL!
My friend smelt a rat and asked if the product had been through a proper clinical trial, and her comment was deleted.
The OP was very secretive about the product and insisted on DMing everyone who commented.
It sounds like a scam doesn't it?