Fat stores refer to the body's reserves of fat, which are stored in adipose tissue. These stores provide energy for the body when needed and also serve as an insulator for organs and a cushion for joints.
Going on a calorie restricted diet for a short time shocks your metabolism, taps into fat stores for energy, and helps you see results in a short amount of time. (consumerhealthdigest.com)
This allows fatty acids to be released from fat stores in your body. (healthline.com)