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Related Experiment Video

Updated: Jun 23, 2026

Assessment of the Metabolic Effects of Isocaloric 2:1 Intermittent Fasting in Mice

Assessment of the Metabolic Effects of Isocaloric 2:1 Intermittent Fasting in Mice

Published on: November 27, 2019

Weight-reducing diets: are there any differences?

John P Foreyt¹, Jordi Salas-Salvado, Benjamin Caballero

¹Department of Medicine, Baylor College of Medicine, Houston, Texas 77030, USA. jforeyt@bcm.edu

Nutrition Reviews

|May 21, 2009

Summary

Comparing low-carbohydrate and low-fat diets for weight loss, this study found that factors beyond calorie count, such as satiety and taste, significantly impact diet effectiveness in real-world settings.

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Last Updated: Jun 23, 2026

Assessment of the Metabolic Effects of Isocaloric 2:1 Intermittent Fasting in Mice

Assessment of the Metabolic Effects of Isocaloric 2:1 Intermittent Fasting in Mice

Published on: November 27, 2019

Multidisciplinary Approach to Obesity Management: A Case Report

Multidisciplinary Approach to Obesity Management: A Case Report

Published on: May 30, 2025

Area of Science:

Nutrition Science
Dietary Interventions
Energy Balance Research

Background:

Weight-loss diets commonly vary in macronutrient composition, primarily as low-carbohydrate or low-fat approaches.
The principle 'a calorie is a calorie' suggests energy balance is independent of macronutrient source under strict metabolic control.
Real-world weight management is influenced by numerous factors beyond simple caloric restriction.

Purpose of the Study:

To compare the efficacy of low-carbohydrate versus low-fat diets for weight loss.
To investigate the complexity of energy balance in free-living individuals consuming diets of differing macronutrient profiles.
To identify diet-related factors influencing weight-loss success in non-controlled environments.

Main Methods:

Comparative analysis of two distinct dietary interventions: low-carbohydrate and low-fat diets.
Assessment of weight-loss efficacy in free-living conditions, moving beyond controlled metabolic unit settings.
Consideration of multiple diet-related factors affecting energy balance, including intake, satiety, hunger, and palatability.

Main Results:

Dietary macronutrient composition influences weight-loss efficacy beyond the 'a calorie is a calorie' principle in free-living situations.
Factors such as total energy intake, satiety, hunger triggers, and palatability play crucial roles in the success of weight-reducing diets.
The interrelationships between diet composition and energy balance are more complex than previously assumed in non-laboratory settings.

Conclusions:

Weight-loss diet efficacy is multifactorial, requiring consideration of macronutrient composition and associated factors.
Low-carbohydrate and low-fat diets may have differential impacts on weight management due to complex interactions with energy balance regulators.
Future weight-loss strategies should integrate a holistic view of dietary influences, including sensory and behavioral aspects, for improved outcomes.