I'll have to look deeper into this, but I don't think the researchers are claiming that FGF21 does damage. The hormone is increased in fatty liver, but it's thought to be a protective response, and FGF21 is being looked at as a possible therapeutic agent. We're looking at a variation of FGF21, these people's hormone may just not work as well as other people's, or they may secrete less or something. It's not FGF21 that's associated with the sweet tooth, it's the particular variant.