How do I start tracking protein?
Work out a target, then log an ordinary week rather than a good one. Do not change what you eat yet: the first week is a measurement, and changing your diet at the same time destroys the only baseline you will get. Most people find they are 20 to 40 g short, and that it lives at breakfast.
Key takeaways
- Do not change your diet in week one. You are measuring, and a changed week measures nothing.
- Log at the meal rather than in the evening. Reconstructing a day from memory is where the big errors come from.
- A meal you guessed at is data. A meal you skipped is a hole, and holes are what end logging habits.
- Weigh your five most common foods once. After that most days are arithmetic you already have.
- Judge the week by how many meals you logged, not by how close you got to the target.
Most tracking habits end in the first fortnight, and usually for avoidable reasons. This is the version that survives it.
- Get a target before you log anythingOtherwise you are recording a number with nothing to compare it against. Body weight in kilograms times the rate that fits your situation, or use the calculator.
- Eat exactly as you normally wouldThis is the measurement week. A week where you ate well because you were watching tells you about that week and nothing about your life.
- Log at the meal, not in the eveningRecall accuracy falls fast, and reconstructing a day at eleven at night is where the largest errors come from.
- Log the estimate rather than skippingA meal you guessed at is data. A meal left out because you could not weigh it is a hole.
- Weigh five things, onceYour usual chicken portion, your usual yoghurt, your usual serving of rice. That is a one-off cost that pays for years.
- Read the week, not the daysHow many meals did you log? Where is the shortfall? Those are answerable. A single low Tuesday is not.
The rule that matters most
Do not change what you eat in week one.
It is the instruction people most want to ignore, because tracking makes you want to do better immediately. The cost is that you never find out where you were. A baseline is a one-time opportunity: once you know you are being watched, you cannot un-know it, and the honest week is gone.
Change things in week two. You will know exactly what to change by then.
What accuracy actually needs to be
Less than people fear, and the reason is structural. Protein recommendations are ranges, not thresholds: 0.8, 1.0, 1.2 or 1.6 g per kilogram, with gaps between them of 20 to 40 percent. Nothing distinguishes 82 g from 86 g.
So the standard is being within about 10 percent on most days, and that is achievable by estimating.
Where accuracy does matter:
- Portion size of the protein food. This is nearly the whole number. A chicken breast runs from 120 g to 250 g, which is a 30 g swing in protein.
- Cooked against dry. 100 g of dry lentils becomes about 240 g cooked, so reading the wrong figure more than doubles the entry.
Where it does not: vegetables, sauces, oil and most sides. A generous serving of vegetables is 3 to 5 g.2
What a normal first week looks like
Uneven, and that is fine.
- Two or three days logged well. Usually the ones with routine in them.
- One day missed entirely. Almost always a weekend.
- One day where you logged breakfast and forgot the rest.
- A total that comes out 20 to 40 g a day below your target.
The last one is the finding. Almost everyone lands short, in the same direction, and the gap is usually at the first meal. A typical breakfast is under 12 g against a main meal target of 25 to 30, which the older-adult guidance points to as the pattern worth changing.3
Judge the week by the right thing
Not by how close you got to the target. By how many meals you logged.
The self-monitoring research is consistent that people who keep tracking do better, and the word doing the work is keep.1 A week where you logged 18 of 21 meals and missed the target every day is a good week. A week where you logged 6 meals and hit the target on all of them tells you nothing.
Week two
Now change one thing, and only one.
Almost always breakfast, because that is where the arithmetic says the gap is. The swaps take no extra time, and one of them usually closes most of the shortfall on its own.
Then keep logging, at whatever level of effort you can sustain in March rather than in the first enthusiastic fortnight. Which logging method suits which meal is worth knowing once you are past week one, because using the fastest acceptable method is most of what keeps a habit alive.
More questions about Tracking and apps
Should I change what I eat while tracking?
Not in the first week. The point of week one is to find out where you actually are, and eating differently because you are watching produces a number that describes an unusual week. Change things in week two, once you know what you are changing from.
How accurate do I need to be?
Within about 10 percent on most days. Protein recommendations are ranges rather than thresholds, and the gaps between them are 20 to 40 percent wide, so nothing turns on whether you logged 82 g or 86 g. Portion size is where accuracy actually matters.
What if I forget a whole day?
Leave it and carry on. A missing day in a protein log is a gap rather than a corruption, unlike in a calorie diary where it makes the total meaningless. Trying to reconstruct it from memory adds error rather than removing it.
