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<p>Nutrition shapes development, health and risk of disease over the life course and across generations. The predominant approaches to understanding these relationships have either been to consider the effects of single nutrients, one at a time, or to consider associations with food types and dietary patterns. Although, to date, the single-nutrient approach has defined much of the scientific enquiry and public debate on the macronutrients — carbohydrate, fat and protein — there is an emerging appreciation that their proportions and quality matter more than their individual effects. Growing evidence demonstrates that macronutrient interactions operate at multiple biological levels, and research on dietary protein has proven a particularly productive entry point for characterizing these mixture effects. In this narrative Review, we begin by analysing key issues and introducing a framework for navigating the complexity of macronutrient mixtures (nutritional geometry), then consider the role of macronutrient proportions on food intake, systemic physiology, health and the risk of disease across the life course. Finally, we discuss how human nutritional biology has been subverted within the modern, industrialized food environment, contributing to the global burden of obesity and related diseases of unhealthy ageing.</p>

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Macronutrient mixtures and interactions in health and disease

  • 期刊论文

  • 发表日期：

    2026年6月22日

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  • Stephen J. Simpson,
  • David G. Le Couteur,
  • Lewin Small,
  • Amanda E. Brandon,
  • David Raubenheimer

摘要

Nutrition shapes development, health and risk of disease over the life course and across generations. The predominant approaches to understanding these relationships have either been to consider the effects of single nutrients, one at a time, or to consider associations with food types and dietary patterns. Although, to date, the single-nutrient approach has defined much of the scientific enquiry and public debate on the macronutrients — carbohydrate, fat and protein — there is an emerging appreciation that their proportions and quality matter more than their individual effects. Growing evidence demonstrates that macronutrient interactions operate at multiple biological levels, and research on dietary protein has proven a particularly productive entry point for characterizing these mixture effects. In this narrative Review, we begin by analysing key issues and introducing a framework for navigating the complexity of macronutrient mixtures (nutritional geometry), then consider the role of macronutrient proportions on food intake, systemic physiology, health and the risk of disease across the life course. Finally, we discuss how human nutritional biology has been subverted within the modern, industrialized food environment, contributing to the global burden of obesity and related diseases of unhealthy ageing.