Protein is the one nutrient the fitness world agrees on and then completely overcomplicates. Walk into any gym and you'll hear that you need a shake within minutes of training, that you can only absorb a fixed amount per sitting, that more is always better. Most of this is exaggerated or simply wrong. For the average man over 30 who wants to stay strong, lean and healthy, the real picture is far simpler — and a lot cheaper — than the supplement aisle suggests.
Why it matters more after 30
From around your thirties onwards, the body gradually loses muscle mass if you do nothing to maintain it — a slow process that accelerates with each decade. Muscle isn't just about looking good; it underpins strength, metabolism, bone health and how well you age. Protein, alongside resistance exercise, is the raw material your body uses to hold onto and rebuild that muscle. Eat too little and the decline speeds up, which is why protein quietly becomes more important, not less, as you get older.
How much you actually need
The official baseline — around 0.75g of protein per kilogram of body weight a day — is set to prevent deficiency, not to optimise health or maintain muscle in an active adult. For a man who exercises and wants to preserve or build muscle, the evidence points considerably higher, commonly in the region of 1.4 to 2.0g per kilogram of body weight per day.
In practical terms, an active man weighing 80kg is looking at somewhere around 110 to 160g of protein daily. That sounds like a lot until you realise it's perfectly achievable from ordinary food — roughly 25 to 40g spread across each main meal, plus a protein-rich snack. You don't need to obsess over the exact gram; getting consistently into that range matters far more than precision.
The timing myths
Here's where a lot of money and worry get wasted.
The "anabolic window" is largely a myth. The idea that you must consume protein within 30 minutes of training or your workout is wasted has been heavily overstated. What matters most is your total daily protein, not the stopwatch. If you've eaten well across the day, missing a shake immediately after the gym changes essentially nothing.
You can absorb more than "20g per meal." Another stubborn myth. Your body uses protein from a large meal perfectly well; it doesn't simply discard the surplus. Spreading intake across meals is sensible and slightly more effective for muscle, but a bigger feed isn't wasted.
Shakes aren't magic. Protein powder is convenient and perfectly fine, but it's just food in powdered form — not a superior source. If you can hit your target with meals, you don't need it at all.
The cheap sources that do the job
You do not need expensive supplements or fashionable products. Some of the best-value protein sits in every supermarket:
- Eggs — cheap, versatile, and a complete protein.
- Tinned fish like tuna, sardines and mackerel — inexpensive, long shelf life, and the oily ones bring healthy fats too.
- Chicken thighs — cheaper than breast, more forgiving to cook, and just as protein-rich.
- Dairy — plain Greek yoghurt, cottage cheese and milk pack protein per penny.
- Lentils, beans and chickpeas — the cheapest protein of all, with fibre as a bonus; combine with grains across the day for a full amino-acid profile.
- Frozen fish and budget mince — no less nutritious than the premium versions.
The simple approach
Forget the timing rituals and the panic about shakes. Aim to include a solid protein source in every main meal, lean towards the higher end of the range if you train, and lean on cheap staples like eggs, tinned fish, dairy and pulses to get there. Pair that with regular resistance exercise — protein without lifting is far less effective at preserving muscle — and you've covered the overwhelming majority of what actually matters. Everything beyond that is fine-tuning, and most of it isn't worth the money or the worry.