Tracking your intake, briefly and usefully

Tracking food intake is either extremely useful or actively harmful, depending on who is doing it and for how long.

Why a short period is useful

Estimation is unreliable in a specific direction. People consistently underestimate intake when eating a lot and overestimate it when eating little.

Which means the person who says they cannot lose weight despite eating very little, and the athlete who says they cannot gain despite eating enormous amounts, are frequently both wrong about the amounts.

A few days of accurate recording resolves it.

What it typically reveals:

Protein intake considerably lower than assumed, particularly at breakfast and lunch.

Energy intake several hundred calories different from the estimate.

Very few distinct plant foods across a week.

Snacks and drinks contributing substantially more than expected.

How to do it properly

Weigh things, at least at first. Portion estimation is poor, particularly for oils, nuts, nut butters and grains — all of which are easy to under-report by a large margin.

A tablespoon of oil, a handful of nuts and a serving of rice are the three most commonly underestimated items.

Record everything, including drinks, cooking oil, the thing eaten standing at the fridge, and what you had at work.

Include a weekend. Weekday and weekend intake frequently differ substantially, and tracking Monday to Thursday produces a misleading picture.

Do not change what you eat while tracking. The point is to measure what you actually do, and the observation itself will change it somewhat regardless.

Four to seven days is sufficient to be informative.

What to look at

Total energy, compared with a rough estimate of requirements.

Protein, total and distribution across meals.

The pattern. Where are the gaps? Which meals contribute nothing?

Variety. Count distinct plant foods across the week. Most people are surprised by how few.

Fibre, which most tracking apps report.

Micronutrient data from apps is less reliable, since food composition databases vary and fortification is inconsistently recorded. Treat it as indicative.

Then stop

The important part.

Long-term tracking is associated with a preoccupation with food that is unhelpful for most people and harmful for some.

Once you know the shape of your intake — which meals are light, roughly what portions look like, where the protein comes from — you can maintain it without recording.

Check again occasionally, or when something changes.

Who should not track at all

Worth stating clearly.

Anyone with a history of an eating disorder. Tracking is a recognised trigger, and the risks outweigh the informational benefit.

Anyone who finds it produces anxiety, guilt after eating, or a preoccupation with numbers.

Adolescents, generally, without professional supervision.

If tracking makes you feel worse about eating, stop. The information is not worth it, and there are other ways to identify a shortfall — looking at the structure of meals rather than the numbers.

The alternative to tracking

For people who should not or will not, a structural approach works nearly as well.

Ask: is there a substantial protein source at every meal? Is there a starch, a fat and vegetables at every main meal? How many different plant foods did I eat this week?

Those three questions identify most problems without any measurement.

The tools

Any of the common tracking applications work. Points worth knowing:

Database entries are user-generated in most apps and are frequently wrong. Prefer verified entries or check them against the packet.

Barcode scanning is convenient and only as accurate as the database.

Recipe functions are useful for anyone cooking from scratch, which is most people eating this way.

A paper notebook works and is frequently less obsessive than an app that gamifies it.

What to do with the result

Change one thing.

Usually the identified problem is a single meal contributing almost nothing, most often breakfast or lunch.

Fixing that one meal — adding a proper protein source — resolves most shortfalls without changing anything else.

Then stop measuring and get on with it.

General information rather than individual advice. Anyone with a history of disordered eating should not track intake without professional support.