Research

Energy balance

For overweight breast cancer survivors, both low-fat and reduced-carbohydrate diets produce equivalent significant weight loss and metabolic improvements when energy intake is restricted, indicating that caloric deficit drives outcomes more than macronutrient composition.

If you are a breast cancer survivor looking to lose weight, you do not need to choose between low-fat and low-carb diets based on ideology. Both work equally well for weight loss and metabolic health as long as you create a consistent calorie deficit (approx. 500 kcal/day) and adhere to professional counseling. Focus on sustainable energy restriction rather than restricting specific macronutrients to extremes.

ModerateQualifiesMEDIUM confidence
Significant weight loss was demonstrated regardless of diet group assignment... Significant improvements in weight and metabolic indexes can be demonstrated among overweight breast cancer survivors adherent to either a carbohydrate- or fat-restricted diet.
Cynthia A. Thomson et al. · Nutrition and Cancer · 2010

Why this rating

Randomized controlled trial but small sample size (n=40) and short duration (24 weeks).

Source

Changes in Body Weight and Metabolic Indexes in Overweight Breast Cancer Survivors Enrolled in a Randomized Trial of Low-Fat vs. Reduced Carbohydrate Diets

Cynthia A. Thomson et al. · Nutrition and Cancer · 2010

DOI 10.1080/01635581.2010.513803

rct · n=40Cited 92×
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DOI resolved against Crossref · corpus check 2026-06-10

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