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Behaviour, books and research · 19 October 2026

When food tracking helps—and when it becomes another demand

A useful record should help someone understand their needs without making every meal a test.

Billy Craig, Consistent Eating — Does an energy deficit increase compensatory effects?.

Research discussion with excerpts from Billy Craig’s books. Practical examples and EPK proposals are interpretations, not results of an EPK clinical trial.

Recording is part of the intervention

Food tracking is often treated as a neutral window onto behaviour. It also asks the person to do something: remember, estimate, search, enter and interpret. Whether that work provides reassurance or pressure is worth measuring.

From Consistent Eating

Billy Craig, Consistent Eating — Does an energy deficit increase compensatory effects?.

A diet can be followed for a month because someone treats the month as an exception. They may postpone meals with friends, avoid particular situations or devote unusual attention to recording food. That can produce useful short-term observations without establishing a sustainable routine. The longer-term question is whether the behaviour can become ordinary enough to continue.

Separating restriction from monitoring

Tomiyama and colleagues used a three-week experiment separating calorie monitoring from restriction to 1,200 kcal/day. Restriction increased total cortisol output; monitoring increased perceived stress. These were different outcomes associated with different components of dieting. [1]

The findings do not establish that every tracking tool is harmful or that cortisol prevented fat loss. They concern a short intervention in women, not a long-term evaluation of EPK. [1]

Feedback should answer a useful question

An illustrative reader may use a short food record to discover that lunch is routinely missed. Another may find that repeated checking makes normal variation feel like failure. The appropriate next step need not be identical. More data is not automatically more helpful data.

A supportive interface could explain uncertainty, permit ordinary variation and avoid moral labels for foods or days. These are design proposals. Their effect on distress, comprehension and sustained use would need to be evaluated rather than assumed.

What to measure in EPK

EPK—Energy per Kilogram—uses estimates to inform fuelling. Wearable estimates and food records contain error, so small apparent discrepancies should not be presented as exact physiological debts. A person should understand what a number can and cannot tell them.

An app study could compare different feedback approaches and record perceived burden, hunger, wellbeing and reasons for stopping. Tracking frequency alone would be a poor measure of success if frequent use reflected anxiety. A useful tool should make everyday eating easier to navigate, and its evaluation should allow the opposite result to be reported.

Behaviour and the conditions for consistency

Research and guidance

Explore more studies in the research library.

  1. Tomiyama AJ et al. Low calorie dieting increases cortisol. Psychosomatic Medicine. 2010;72:357–364.

Related working papers

Read the relevant PDFs: EPK–001 to 007 are the revised version 1.2 papers; EPK–008 to 010 are version 1.0 supplements. Earlier PDFs and DOI records remain on the paper archive.