JAMA Medical News Why the Low Carb vs Low Fat Debate Misses the Point
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Feb 27, 2026 Samantha Anderer, a JAMA Medical News staff writer covering research and health topics, discusses a long-term study comparing low-carb, low-fat, and food quality for heart health. She explains how healthy versions of both diets cut heart disease risk, while unhealthy versions raise it. The conversation highlights focusing on whole foods and warns against relying on processed, protein-marketed products.
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Food Quality Outweighs Low Carb Versus Low Fat
- Diet quality matters more than whether a diet is low-carb or low-fat for coronary heart disease risk reduction.
- Healthy low-carb and healthy low-fat patterns both linked to lower CHD risk, while unhealthy versions of both linked to higher risk in 30+ years of cohort data.
Choose Whole Foods Over Macro Counting
- Focus on whole, high-quality foods rather than just targeting macronutrient percentages.
- Healthy definition included vegetable proteins and fats, non-starchy vegetables, whole fruits, legumes, and whole grains versus animal fats, refined grains, potatoes, and added sugars.
Healthy Diets Improve Lipids And Inflammation
- Healthy diets improved lipid and inflammatory biomarkers linked to heart disease risk.
- Specifically, healthy patterns were associated with lower triglycerides, lower C-reactive protein, and higher HDL cholesterol.