MacLean, PS; Blundell, JE; Mennella, JA; Batterham, RL; (2017) Biological Control of Appetite: A Daunting Complexity. Obesity , 25 (S1) S8-S16. 10.1002/oby.21771.

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Abstract

Objective: This review summarizes a portion of the discussions of an NIH Workshop (Bethesda, MD, 2015) titled “Self-Regulation of Appetite—It's Complicated,” which focused on the biological aspects of appetite regulation. Methods: This review summarizes the key biological inputs of appetite regulation and their implications for body weight regulation. Results: These discussions offer an update of the long-held, rigid perspective of an “adipocentric” biological control, taking a broader view that also includes important inputs from the digestive tract, from lean mass, and from the chemical sensory systems underlying taste and smell. It is only beginning to be understood how these biological systems are integrated and how this integrated input influences appetite and food eating behaviors. The relevance of these biological inputs was discussed primarily in the context of obesity and the problem of weight regain, touching on topics related to the biological predisposition for obesity and the impact that obesity treatments (dieting, exercise, bariatric surgery, etc.) might have on appetite and weight loss maintenance. Finally considered is a common theme that pervaded the workshop discussions, which was individual variability. Conclusions: It is this individual variability in the predisposition for obesity and in the biological response to weight loss that makes the biological component of appetite regulation so complicated. When this individual biological variability is placed in the context of the diverse environmental and behavioral pressures that also influence food eating behaviors, it is easy to appreciate the daunting complexities that arise with the self-regulation of appetite.

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