If you only manage to get one thing right about your eating, make it protein. It is the macro that protects your muscle, keeps you full, and quietly does most of the work while you focus on everything else.
Why protein matters most in a deficit
When you eat below maintenance, your body looks for energy to make up the shortfall. Ideally that comes from fat. But without enough protein — and without a reason to hold onto it — your body will also break down muscle for fuel. That is the outcome nobody wants: you lose weight on the scale, but some of it is the very tissue that gives you shape, strength and a healthier metabolism.
Eating enough protein sends the opposite signal. Paired with some resistance training, it tells your body to keep the muscle and take the energy from fat instead. This is why two people can lose the same number of kilos and look completely different at the end: one kept their muscle, the other didn't.
Protein pulls a second shift too — satiety. Gram for gram it is the most filling of the three macros. It digests slowly, blunts hunger, and takes more energy just to process. In a deficit, where hunger is the thing most likely to derail you, that is an enormous advantage. Hitting your protein often makes the whole diet feel easier, almost by accident.
A simple per-kilo guideline
You don't need to overthink the number. A practical target for most people losing fat is around 1.6–2.2 grams of protein per kilogram of body weight per day. For someone at 75 kg, that is roughly 120–165 g.
The higher end of that range earns its keep in two situations: when you are leaner and dieting harder (more muscle to protect, less fat to spare), or when you are training seriously. If you are carrying more body fat, basing the target on your lean mass — or a goal weight closer to where you're headed — gives a more sensible figure than scaling off your current weight, which can otherwise inflate the target.
A calculator takes the guesswork out and lands you on a daily number to aim at.
Daily protein
155–189g
Aim for the upper end on training days.
Don't treat that figure as a hard ceiling or a source of stress. It is a target to move toward, not a bar you fail to clear. Getting close, most days, is what counts.
Foods that make it easy
Hitting your protein is far simpler when you know where it actually lives. Build meals around a protein source first, then add the rest. Reliable, everyday options:
- Lean meats and poultry — chicken breast, turkey, lean beef and pork.
- Fish and seafood — salmon, tuna, cod, prawns.
- Eggs and dairy — whole eggs, Greek yoghurt, cottage cheese, milk.
- Plant sources — tofu, tempeh, edamame, lentils, beans, seitan.
- Convenient toppers — a scoop of whey or plant protein, or a bit of protein powder stirred into yoghurt or oats when a meal falls short.
A useful habit: aim for a solid palm-sized portion of protein at every meal. Do that three or four times a day and you are most of the way to your target without tracking a single gram.
Protein is 80% of eating well
Get your protein right and a lot of other things fall into place on their own — you're fuller, you snack less, and you hold your muscle while the fat comes off. You don't need a perfect diet. You need enough protein, most days, and the patience to let the rest be simple.
Consistency beats perfection
The people who succeed with protein aren't hitting a precise number to the gram every day. They have a few default meals they can lean on, they keep easy sources in the fridge, and they land in the right range most of the time. Miss a day and nothing unravels — it is the weekly average that shapes your results, not any single dinner.
That is genuinely most of "eating well." Not a rulebook, not forbidden foods — just enough protein, spread across your day, without it becoming a second job.
Let Sophia keep the count
The one catch is that protein is easy to underestimate — a meal that feels protein-heavy can fall well short, and by the time you notice, the day is over. Sophia closes that gap. Tell her what you ate in plain language — "chicken salad and a yoghurt" — and she works out the protein for you, tracks it across the day, and gives you a quiet nudge if you are drifting low with meals still to come. You aim for the food; she keeps the count, bite by bite.