Calorie and Macro Logging

Calorie/macro logging records what you eat as energy (kcal) and macronutrients — protein, carbohydrate, fat (and often fiber). It's the intake side of Caloric Balance (Energy Balance), the lever that actually governs fat loss and gain, and it makes otherwise invisible eating patterns measurable.

What to capture:

• Total calories — the primary number for weight direction.
• Protein — the macro most worth hitting a target on for body composition (muscle retention in a deficit, growth in a surplus); see Protein — Functions, Quality, and Requirements.
• Carbs and fat — relevant for performance and preference; see Macronutrients as Energy Sources.

How accurate is it: logged intake is itself an estimate. Even careful loggers commonly under-report by a meaningful margin (forgotten bites, oils, restaurant portions). So the intake log should be calibrated against the bodyweight trend (see Bodyweight Tracking): if you're logging a deficit but the trend is flat over 2–3 weeks, the true intake is higher than logged — adjust the target, not your faith in the app. This pairs with the warning that device Calories Burned (Estimates) are also rough, so manage from intake + weight, not a precise in-vs-out ledger.

Tooling: weighing vs estimating portions changes accuracy a lot (see Weighing vs Estimating Food); a lighter food diary (see Food Diary (Non-Numeric Logging)) is an alternative for those who don't want numbers; and the headline tracking output is adherence to the plan (see Adherence Tracking).

• Log total calories (weight direction) and protein (composition), plus carbs/fat.
• Intake logs are estimates; under-reporting is common and meaningful.
• Calibrate the log against the bodyweight trend, not vice versa.
• Combine with the weight trend rather than trusting an in-vs-out calorie ledger.
• Protein is the macro most worth a hard target for body composition.