Our job seems easy when compared with that of our cells. While they are hard at work, breaking some molecules and building others, we mainly have to do one thing—feed them. But what exactly should we feed them? This is not an easy problem to solve considering the constant competition happening inside. Whereas some cell types, like fat cells, crave lipids, others may prefer protein or sugars. How does the brain factor in all competing demands and spit out a decision when faced with difficult choices like steak or ice cream?