Why is it important to inject insulin into the fatty layer beneath the skin?

Injecting insulin into the fatty layer beneath the skin is crucial to ensure proper absorption of the hormone into the bloodstream. This subcutaneous layer has a rich blood supply, facilitating the gradual release of insulin into circulation. When insulin is injected too superficially into the skin or too deeply into muscle tissue, its absorption may be erratic, leading to variations in blood glucose levels. Proper absorption is vital for maintaining stable blood sugar levels and achieving effective diabetes management.

While factors such as pain, scarring, and infection are important considerations in the injection process, they do not directly relate to the pharmacokinetics of insulin absorption in the body. The emphasis on injecting into the fatty layer highlights the necessity of proper insulin administration techniques to optimize therapeutic outcomes for individuals with diabetes.