Fatty acids are a chemical included from Creatures 2 onwards. It is a byproduct of the stomach breaking down fat during digestion. If there is too much glucose and insulin present in the bloodstream, the Pancreas Beta will convert the glucose to fatty acids. The Pancreas Beta converts fatty acids to triglycerides and then adipose tissue. The Pancreas Alpha can convert adipose back into fatty acids. In both C2 and C3/DS, fatty acids are used to help make Prostaglandin.