Question The hormone leptin regulates food intake and body weight. It can… The hormone leptin regulates food intake and body weight. It can cross the blood-brain barrier. Search PubMed (www.pubmed.gov (Links to an external site.)) for blood-brain barrier and leptin and select two original research articles about leptin. Summarize the results of these articles. Which proprieties of leptin allow it to cross the blood-brain barrier? How does leptin regulate energy balance? Health Science Science Nursing PHYSIOLOGY 3733 Share QuestionEmailCopy link Comments (0)