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Weight loss

A calorie deficit and the methods that promise to work around it. What the research shows, rather than the advertising.

Calorie deficit: how to calculate it and how to hold it

A calorie deficit is the one thing without which weight does not come down. The arithmetic takes two lines. The difficulty is confirming that the deficit is actually there — and the scale needs about three weeks to tell you.

From reading to doing. All of it starts in one place — knowing what is on the plate. Photograph it and the calories and macros appear on their own.

Count it from a photo

Other sections: Nutrition · Calorie counting · Health · All articles

This article is for general information. It is not medical advice, a diagnosis, or a prescription for treatment or a diet, and it does not replace a consultation with your doctor. If you have a health condition, are pregnant, take medication, or follow a diet prescribed to you, decisions about food belong with your doctor.

Figures from regulations, guidelines and studies are given as they stood when this article was prepared and may since have changed; check them against the primary sources. This article is not advertising, an offer, or individual advice, and neither the author nor the site owner is responsible for decisions taken on the basis of it.