“When considering how and why these modality specific mechanisms evolved, it is interesting to note that mammals were primarily exposed to alcohol from fermenting fruits, which possess high levels of simple sugars,” says senior study author Matthew Potthoff (@potthofflab) of the University of Iowa Carver College of Medicine. “Despite this, neural circuits regulating FGF21-mediated suppression of sugar and alcohol intake apparently developed independently and not in response to a shared selective pressure.”

Treatment keeps alcoholic monkeys from drinking as much — ScienceDaily