Perhaps you skipped breakfast this morning. It's nearly noon and your stomach is starting to rumble. Or maybe you're working late and developing a headache because you haven't had dinner yet. In both of these cases, your body is sending a clear signal: Give me food, right now. Figure out how that signaling works and the world will beat a pathway to your door. Controlling weight, after all, is important for cosmetic and medical reasons, and it's already a multibillion-dollar business.
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