Why protein still matters, and how to make it work
Protein has been having a moment for about a decade now, and most of the noise around it is marketing. Strip that away and a small number of claims genuinely hold up, enough to change how you plan a normal week of eating. Here is what the evidence supports, where Australians actually fall short, and what to ignore.
What protein does that carbs and fat do not
Three things, reliably.
- It keeps you full. Gram for gram, protein is the most satiating of the three macronutrients. That is why a breakfast built around eggs or yoghurt holds until lunch and one built around toast and fruit usually does not.
- It protects muscle. Muscle tissue is constantly broken down and rebuilt, and protein supplies the raw material. This matters most in two situations: when you are training, and when you are in a calorie deficit.
- It costs more to digest. Roughly 20 to 30 per cent of protein's energy is used up processing it, against about 5 to 10 per cent for carbohydrate. A small effect, not a weight-loss shortcut, but a real one.
The number that actually applies to you
The Australian and New Zealand Nutrient Reference Values put the Recommended Dietary Intake at about 0.84g per kilogram of body weight per day for men and 0.75g for women. For an 80kg man that is roughly 67g.
That figure is a deficiency floor for a sedentary population, not a target for anyone who trains. Once you train regularly the useful range widens to 1.2 to 2.0g per kilogram, depending on what you are training for.
The full breakdown, including how to work out your own number, is in How much protein do you actually need a day?
Protein is not just a gym nutrient
The most interesting shift of the last few years has nothing to do with training. From roughly the age of forty, adults lose muscle mass steadily unless something is done about it, and that loss is a strong predictor of how well people keep their independence later on. Two things slow it: resistance training, and eating enough protein to support it.
That is why the RDI rises for over-70s in the Australian guidelines, to about 1.07g/kg for men and 0.94g/kg for women. The people who arguably need protein most are the least likely to be reading a supplement label.
Where Australians actually fall short
Not at dinner. Almost nobody is short at dinner. The gaps are consistent, and they sit in two specific slots.
Breakfast: toast, cereal, fruit and coffee usually lands under 10g. Mid-afternoon: the 3pm dip typically gets filled with something carbohydrate-heavy. Fixing those two slots alone often adds 40 to 50g a day without touching your evening meal.
Spread it out, do not stack it
You cannot bank protein. Muscle protein synthesis responds to a dose in a given meal, and once that response is triggered, extra protein in the same sitting adds little. The practical version is 25 to 40g per meal, three or four times a day.
Someone eating 120g spread evenly will recover better than someone eating 150g stacked into dinner. The total matters less than people think. The distribution matters more.
What 25 to 30g looks like
- One 100g pack of shelf-stable chicken breast, 24 to 25g, no cooking, no fridge
- Roughly 120g of cooked chicken breast, about 35g
- A 200g tub of Greek yoghurt, about 20g
- A 95g tin of tuna, about 22g
- Two large eggs with a slice of cheese, about 20g
- A cup of cooked lentils, about 18g
- One protein shake, typically 20 to 25g
What to ignore
- "High protein" on the front of the pack. Check the panel. Plenty of products carrying that flash deliver 5 to 8g a serve, which is not a protein serve in any meaningful sense.
- The anabolic window. The idea that you have thirty minutes after training to get protein in has not survived scrutiny. Total daily intake and sensible spacing matter far more.
- Protein damaging healthy kidneys. In healthy adults, intakes in the ranges above are well tolerated. Existing kidney disease is genuinely different. Talk to your GP or an Accredited Practising Dietitian first.
Food first, convenience for the gaps
If you can hit your number with normal meals, do that. Whole food brings micronutrients, fibre and satiety that a powder does not.
Ready-to-eat protein solves a logistics problem, not a nutrition one. It earns its place when the alternative is missing the target entirely: no fridge at work, training straight after the office, travelling, or a 3pm gap with nothing sensible nearby. Twenty-five grams from a pack in your bag beats zero from a perfect meal you did not have time to make.
The short version
- Protein's real advantages are satiety, muscle retention and a small thermic cost, not the claims on the packaging
- The Australian RDI is a floor; 1.2 to 2.0g/kg is the range if you train
- Three or four meals of 25 to 40g beats one big hit at dinner
- Breakfast and mid-afternoon are where most people lose 40g a day
- Build the total from real meals and use convenience protein for the gaps that keep repeating
25g of protein, no fridge, no cooking.
Tuk-Dak shelf-stable chicken breast keeps in a desk drawer or a gym bag for months. Dispatched same day from our Sydney warehouse.
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