When is Leptin Secreted When is Leptin Secreted. The term “leptin” derives from the Greek leptos, which means thin, and regulates body weight, metabolism, and reproductive function. Leptin is a protein of approximately 16 kDa that is secreted by the stomach epithelium. Its receptors are found in the hypothalamus, T lymphocytes, and vascular endohyocytes. Regulation…
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