Cortislim works by controling cortisol. Cortisol is one of our primary stress hormones. In small amounts, cortisol is used by the body to control carbohydrate metabolism, inflammation, and cardiovascular function. Cortisol is better known as the “fight-or-flight” hormone as well. Small amounts of cortisol are a “good” thing, however, too much cortisol, biult up in for body for an extended amount of time is not, because it leads persons to develop a number of health conditions.