Calorie counting
The practical half: where the numbers come from, how accurate they are, and what they can and cannot tell you.
Negative calorie foods: is celery really more expensive to digest than it is worth?
Celery is the food people name when they want an example of negative calories: eat it and you end the day lower than you started, because digesting it supposedly costs more than it delivers. The cost of digestion is real and has been measured. The only question is how large it is, and that is easy to work out.
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.
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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.