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Related Experiment Videos

Peripheral signals affecting food intake.

R J Stubbs1

  • 1Rowett Research Institute, Bucksburn, Aberdeen, Scotland. J.Stubbs@rri.sari.ac.uk

Nutrition (Burbank, Los Angeles County, Calif.)
|July 28, 1999
PubMed
Summary
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Peripheral signals from food intake influence appetite and energy balance. Protein is most satiating, followed by carbohydrates (CHOs), while fat is least satiating, impacting weight gain.

Area of Science:

  • Physiology
  • Neuroscience
  • Nutritional Science

Background:

  • Peripheral signals from food intake, including gastrointestinal, circulating, metabolic, and neural factors, regulate feeding behavior.
  • Nutrient metabolism and diet composition significantly influence postingestive satiety and energy balance (EB).

Purpose of the Study:

  • To explore the role of peripheral appetite signals in energy and nutrient balance.
  • To examine the differential satiating effects of macronutrients (protein, carbohydrates, fat) on feeding behavior.
  • To review current understanding of peripheral signaling mechanisms in maintaining energy homeostasis.

Main Methods:

  • Review of existing literature on peripheral signals and their impact on feeding behavior and energy balance.
  • Analysis of macronutrient metabolism and its relationship to satiety.

Related Experiment Videos

  • Comparison of satiating effects of protein, carbohydrates (CHOs), and fat.

    • Main Results:

    • Protein is the most satiating macronutrient, followed by CHOs, while fat is the least satiating per joule.
    • Inhibition of carbohydrate metabolism or declines in plasma glucose stimulate intake.
    • High-fat diets are linked to excess energy intake and weight gain, with fat intake being a risk factor.

    Conclusions:

    • Peripheral signals play a crucial role in regulating appetite and energy balance.
    • While protein and CHO signaling are relatively understood, 'aminostatic' mechanisms and the quantitative importance of peripheral signals require further investigation.
    • Fat status signaling primarily originates in the periphery, influencing energy intake and body weight regulation.