A hormone of adipose tissue that regulates appetite, satiety, and energy expenditure. Decreased sensitivity to leptin is associated with obesity and metabolic disorders. The test is used to assess fat metabolism and hormonal control of appetite.
Normal range:
- Women: 4.1–25.0 ng/ml
- Men: 0.5–9.0 ng/ml
Reasons for increased values: obesity, leptin resistance, insulin resistance
Reasons for decreased values: adipose tissue deficiency, anorexia, depletion