Hormonal

Perilipin acts as a dynamic scaffold on adipocyte lipid droplets that restricts basal lipolysis by blocking cytosolic lipase access, and upon PKA phosphorylation during energy deficit, facilitates maximal lipolysis by coordinating the docking of hormone-sensitive lipase and adipose triglyceride lipase.

Your body uses a protein called perilipin to manage fat storage. When you are not exercising or fasting (basal state), perilipin acts as a shield, preventing enzymes from breaking down stored fat. When you create an energy deficit (e.g., through exercise or fasting), hormones trigger a signal (PKA) that phosphorylates perilipin. This changes its shape, removing the shield and allowing fat-burning enzymes (ATGL and HSL) to access and break down the fat. Without this protein's dynamic regulation, your body cannot efficiently switch between storing and burning fat.