Palmitic acid is 16 carbons long, fully saturated, and commonly found in palm oil and animal products, including beef, eggs, milk, poultry, and seafood. Palmitic acid has long been implicated in CVD, as it tends to raise LDL cholesterol. Among the saturated fats, it would appear palmitic acid does pose the greatest likelihood of increasing LDL cholesterol. However, palmitic acid has also recently been shown to be vital both to forming new memories and accessing long-held memories. As we shall see when we investigate how our diet has changed, a Paleo diet supplies an adequate amount of palmitic acid for optimum cognitive function while limiting the intake to levels that are not harmful to the cardiovascular system. It is also important to note that excessive carbohydrate intake leads to palmitic acid production. If you recall from the insulin chapter, when liver glycogen is full, additional carbohydrate is converted to palmitic acid. This process appears to blunt our sensitivity to leptin, which then inhibits our satiety to a normal meal. This is the beginning of insulin resistance and is at the heart of the mechanism of how we cease to respond to food by feeling "full."
