Food and mood log

A meaningful fraction of clients arriving with mood instability, irritability, sleep complaints, or fatigue have a dietary or substance pattern doing some of the work, and most have no idea. Caffeine intake after midday is the most common one. Sugar-driven afternoon crashes is the second. Alcohol-driven morning anxiety is the third. None of these are visible to the client without a structured log because the gap between the intake and the symptom is hours long, and human memory bridges that gap badly.

This worksheet runs as a parallel log alongside whatever else you’ve assigned. Seven days of paired entries: what was eaten and drunk, and the predominant moods of the day. The client doesn’t need to be exhaustive. The point is patterns, not nutritional accuracy. A glass of wine in the evening followed by waking at 4am with anxiety is the kind of paired data the log surfaces.

Use it for any case where there’s a plausible dietary contribution. Anxiety with high caffeine intake. Mood instability in clients who skip breakfast and lunch. Sleep disturbance in clients who report two or three glasses of wine a night. Depression in clients whose food intake has dropped to crisps and toast. Don’t use it for clients with eating disorders without specialist consultation, because the food-tracking can interact badly with restrictive patterns.

The clinical move after a week of submissions is to identify one variable to test by removing or modifying it for two weeks while keeping everything else the same. Cut caffeine after 11am, see if sleep improves. Add a real lunch on weekdays, see if afternoon mood crashes. The log gives you a baseline and the next week’s log gives you the comparison. The client experiences the change as their own discovery, which produces durable behaviour change in a way external nutrition advice doesn’t.

The thing to watch for is the client who fills the log in retrospectively from memory on the day before next session. Cracker-and-toast for breakfast every day for seven days is suspicious. The data needs to be captured close to the meals, not reconstructed.

In my-cbt, this is one of the bundled system worksheets. Assign it from the case file with a personal message asking the client to fill it in throughout the day rather than at the end. Submissions save with timestamps so you can see whether they’re being logged in real time or after the fact.