Key points from article :
Some people are genetically attuned to crave sweet sustenance.
Examined genes of 6,500 Danish people taking part in a heart disease study.
People with FGF21 variant were 20 percent more likely seek out sugar.
FGF21 provides instructions for making a food regulation hormone.
Liver may play a larger role in snack management than previously known.
Strangely these people also tended to have lower body mass index.
The study was published in the Cell Metabolism journal.
