Low-Fat vs Low-Carbohydrate Diets for Weight Loss
Both lower-fat and lower-carbohydrate eating patterns can support weight loss when they create a sustainable energy deficit. Food quality and adherence matter more than a universal winner.
How to choose
Consider hunger, food preferences, culture, diabetes medicines, lipids, kidney or gallbladder disease, pregnancy, exercise and the ability to maintain the pattern. A ketogenic diet is more restrictive and is not automatically medically superior.
NHLBI summarized a randomized comparison as essentially a draw between healthy low-fat and low-carbohydrate approaches. NHLBI overview
How W8MD can help
W8MD physicians compare nutrition, activity, sleep, medical conditions, prior attempts, preferences, prescription options, coverage and cost. The goal is a plan that protects health and can be maintained rather than a temporary challenge.
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Content reviewed for general accuracy by W8MD clinical leadership. Last reviewed September 2026.