Could a Protein Gap Be Costing You Muscle as You Age?
Protein supplements aren't just for bodybuilders. Used as a top-up, they may help older adults, plant-based eaters and others close a real protein gap.
For most of my career, I’d have told you protein shakes were firmly gym-bro territory.
I prescribed them in the hospital, sure: post-surgical patients who couldn’t eat enough, people recovering from serious illness. But for healthy folk going about their normal lives? A waste of money at best, and probably a nudge toward worse long-term health.
Then I took a proper look at my own breakfast.
I eat what most people would call a healthy morning meal: Fruit and Fibre mixed with muesli, milk, and a cup of tea on the side. Total protein? About 11g. Throw in some toast with peanut butter, and I could stretch that to around 24g. Sounds reasonable, right?
Except that from your mid-sixties, experts recommend aiming for roughly 30 to 40g of protein at a meal to give ageing muscle a stronger repair signal, and that’s especially important at breakfast. My “healthy” breakfast was delivering well below the dose that matters most.
To be fair, I’m not in my mid-sixties yet, but I’m not even hitting the 20g of protein ideal for someone younger, and I can’t imagine eating much more first thing in the morning.
It was time to swallow my pride, along with a protein shake, with my breakfast!
And here’s the part I hadn’t fully appreciated: the people most likely to benefit from a protein supplement aren’t the ones browsing the supplement aisle.
They’re older adults quietly losing muscle they can’t afford to lose, plant-based eaters fighting food volume, people trying to lose weight without sacrificing lean mass, and anyone recovering from illness or surgery.
The very people who’d probably never think to pick up a tub of protein powder.
The question isn’t “do protein shakes work?” It’s simpler than that: do you have a protein gap they could usefully fill?
Why protein needs rise with age
The older we get, the more precious muscle becomes.
One of the most underappreciated health risks in later life is sarcopenia: the gradual, age-related loss of muscle that can quietly steal your strength, balance and, eventually, independence. It’s what makes getting out of a chair harder, makes falls more likely, and slows recovery when illness strikes.
Protein is one of the tools we use to slow that process.
As we’ve discussed in earlier issues, from your sixties onwards you need around 1.2g of protein per kilogram of body weight (0.54g/lb) each day, split across meals of roughly 30 to 40g of actual protein per sitting (that’s protein itself, not the weight of protein-rich food).
Those large, well-timed doses matter because ageing muscles become less responsive to smaller protein hits. Your body needs a bigger signal to flip from breaking down muscle to building it up.
But 40g of protein per meal is more food than most people realise. It’s not a spoonful of Greek yogurt or a sprinkling of seeds. It’s:
~340g (12oz) cottage cheese
~175g (6.2oz) chicken or turkey breast
~460g (16oz) Greek yoghurt
~570g (20oz) chickpeas
That’s a full plate, three times a day. And just as protein needs increase with age, appetite tends to shrink. It’s a dangerous mismatch, and a big part of why muscle loss and frailty are so common in later life. The problem is even steeper for people eating a mostly plant-based diet, where the food volumes are greater still.
If eating enough whole foods to hit these higher targets is too much of a challenge, a top-up from a protein shake is a practical way to reduce muscle loss and support healthy ageing.
Protein alone isn’t the whole story, either. Without resistance exercise, extra protein is like having bricks delivered every day when you’ve forgotten to hire the builders. Both the raw material and the building signal matter. We’ve talked about this before.
The breakfast gap
Of all your meals, breakfast is usually the biggest protein weak point.
Western breakfasts lean heavily toward carbohydrates: cereal, toast, porridge, fruit, juice. All perfectly good foods, but few deliver anything close to 30 to 40g of protein.
There’s a physiological reason why this matters beyond the daily total. Overnight, your body breaks down muscle to supply itself with amino acids. Breakfast is the first opportunity to switch from that breakdown state back toward muscle building, and that takes a meaningful protein dose to trigger.
I could eat eggs every morning to close the gap, but I don’t. I like eggs, but the link between high egg intake and poorer long-term health outcomes keeps them off my daily menu. So I now add a pea protein shake alongside my usual cereal and muesli. Not instead of breakfast: alongside it.
That distinction matters. A shake on its own won’t give you the fibre, fruit, whole grains and healthy fats you need, and it’ll probably leave you hungry by mid-morning.
Ideally, you’ll meet your protein needs at lunch and dinner through whole foods: meat, fish, dairy, legumes, grains and vegetables. That way, you also get vitamins, minerals, fibre and phytonutrients that no powder can replicate.
But where meals consistently fall short, whether because of poor appetite, convenience, or sheer food volume, a simple top-up can close the gap.
The shake is not the meal. It’s the missing piece.
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When plant-based diets come up short
A plant-based diet can absolutely provide enough protein. But it often requires more planning, more volume and more appetite than people expect.
Plant foods tend to be lower in protein density than animal products. They’re also higher in fibre, which is a good thing, but it can fill you up before you’ve eaten enough protein. And most plant proteins are incomplete: missing one or more of the nine essential amino acids your muscles need.
None of that’s a deal-breaker. My diet is mostly plant-based. It just means you need a wider variety and a greater volume to hit your targets.
If you’re younger and active, eating plant-based, and struggling to reach 20 to 25g of protein per meal, a supplement may help you maintain or build muscle more effectively, especially alongside resistance training. On the flip side, if you’re meeting your per-meal targets from whole foods and not losing strength, you’re likely doing fine without one.
From your mid-sixties, though, the picture shifts.
A 40g-per-meal target from plants alone means roughly 500g of tofu, half a kilogram of brown rice, or 570g of canned chickpeas at a single sitting. Three times a day. That’s a very full stomach.
In that context, a scoop of blended plant protein, something like pea plus rice that covers the full amino acid profile, becomes genuinely useful: concentrated protein without all the bulk. It allows you to enjoy a normal sized meal and still get the protein you need.
Again, this is not about replacing plants. It’s about making the diet you already value easier to sustain.
Protecting muscle while losing weight
Protein also becomes more important when you’re trying to lose weight.
When you cut calories, your body doesn’t just burn fat. It can also break down muscle. And losing muscle matters more than most people appreciate:
Muscle powers movement. Even modest losses reduce strength and functional ability. In older adults, this directly increases the risk of falls, fractures and frailty.
Muscle is your metabolic engine. The more you carry, the more energy you burn at rest. Lose it, and your metabolism slows, making future weight regain more likely.
Muscle is your emergency reserve. During illness or injury, your body draws amino acids from muscle for healing and immune function. Deplete that reserve in your forties or fifties, and there’s less to draw on when it counts.
Replacing that lost muscle is a lot harder than losing it.
So, how do you protect muscle during a calorie deficit? Higher protein intake, combined with resistance training.
In a study of 80 older adults with obesity, participants followed a reduced-calorie diet and did resistance training three times a week. Those receiving extra protein lost more fat (3.2kg versus 2.5kg) and gained 0.4kg of muscle, while the group without extra protein lost 0.5kg of muscle, despite consuming slightly more calories. That’s a double win.
A separate trial in healthy young men on a reduced-calorie diet with intense training found a similar pattern: those consuming 2.4g/kg/day lost more fat (4.8kg versus 3.5kg) and gained more lean mass (1.2kg versus 0.1kg) compared with 1.2g/kg/day. These were young men training hard, so the results don’t translate directly to a typical reader. But the direction is consistent: when calories are restricted, more protein tends to mean more fat loss and better muscle preservation.
If you’re trying to lose weight, aim for around 1.1 to 1.2g of protein per kilogram of body weight daily. If that’s hard to manage without exceeding your calorie budget, a protein supplement can be a practical tool. It gives you a lot of protein for relatively few calories.
If someone came to mind while you were reading this, please forward it to them. These tweaks may be small, but practised consistently they can genuinely change long-term health. A useful nudge at the right moment can make all the difference.
Bouncing back from illness or surgery
After a hospital stay, surgery or serious illness, muscle loss can happen alarmingly fast. Older adults are especially vulnerable, but this can matter at any age after a major illness or prolonged period of inactivity.
Inflammation, bed rest, poor appetite and physiological stress all chip away at muscle mass, often before you notice. For older adults in particular, the loss can be both sudden and significant, and regaining it takes real work.
Most clinical guidelines recommend 1.2 to 1.5g of protein per kilogram of body weight per day during recovery. When appetite is suppressed and food doesn’t appeal, that’s a difficult target from meals alone. A supplement can bridge the gap while the rest of your recovery catches up.
Recovery needs are individual. If you or someone you care for is bouncing back from illness, injury or surgery, talk to a healthcare professional about the right nutritional approach for that specific situation.
When supplements aren’t the answer
For adults under 60 who eat well and train consistently, the evidence for protein supplements is surprisingly modest. A 2020 meta-analysis of 105 studies found that people taking supplements while doing resistance training gained, on average, an extra 480g of lean body mass. For a 70kg man, that’s roughly 0.7% of body weight. Not nothing, but not the transformation the marketing implies.
There are contexts where that matters: athletes, competitive lifters, people training hard, people under-eating protein, or those with specific body composition goals.
But for the average healthy, weight-stable person under 60–65 who already eats protein-rich meals, the missing ingredient is more likely to be resistance training than another scoop of powder.
There’s a broader caution, too: consuming protein beyond your actual needs has been linked to poorer long-term health outcomes in adults under 60, as I’ve written about previously.
One important safety note for all ages. Chronic kidney disease is increasingly common in later life, affecting roughly half of people in their seventies, and nine in ten don’t know they have it. A high-protein diet can accelerate kidney disease progression. If you have known kidney problems, risk factors, or you’re simply unsure, talk to your doctor before making a significant increase in protein intake.
What this means for your health
A protein supplement isn’t a health upgrade by default. It’s useful when it closes a repeated, measurable gap between what your muscles need and what your meals are actually delivering.
The most likely beneficiaries: older adults struggling to reach 30 to 40g of protein per meal, plant-based eaters fighting food volume, people trying to preserve muscle while losing weight, and anyone recovering from illness or surgery. The least compelling case? A younger, weight-stable adult who already eats enough protein and mainly needs to train more consistently.
Whole foods should always come first. Supplements fill gaps; they don’t replace the fibre, vitamins and phytonutrients in real meals. And protein without resistance exercise is only half the equation: the raw material without the building signal.
So: do you actually have a gap worth closing? There’s an easy way to find out.
HEALTH TWEAK OF THE WEEK
Many of us eat less protein than we think, especially at breakfast.
If you’re over 65, losing weight, eating plant-based, or recovering from illness, a simple protein supplement used as a top-up (not a meal replacement) can help you hit the per-meal targets that matter for muscle, strength and independence.
You ought to know how much protein you’re consuming, and how well that meets your needs. So, this week, check whether you have a real protein gap, starting with breakfast.
1. Audit your breakfast protein. Track two or three typical mornings using a free app like Cronometer, MyFitnessPal, or CheckYourFood. Compare your total against roughly 20 to 25g per meal if you’re under 65, or 30 to 40g per meal from your mid-sixties onwards. Breakfast is usually where the biggest gap lives.
2. Try whole-food fixes first. Add Greek yogurt, cottage cheese, milk, tofu, tempeh, beans, lentils, fish or poultry where they fit naturally. If you can close the gap with real food, you don’t need a supplement. Don’t be tempted by ultra-processed “high-protein” snack foods dressed up as health products.
3. Use a simple supplement for the remaining gap. If whole foods aren’t getting you there, choose whey concentrate if you eat dairy, or a pea/rice blend if plant-based. Skip collagen and BCAAs for muscle building: they’re not up to the job. And pair your protein with resistance exercise at least two to three times a week. Without the building signal, extra protein has limited benefit.
If you’re under 60 or 65, eating a varied diet, maintaining your strength, and already getting decent protein at each meal, you probably don’t need a daily shake.
This isn’t about having a variety of coloured shaker bottles to match your Lycra gym wear; it’s about closing a real gap when ordinary meals are no longer quite doing the job.
🎧 Prefer to listen while wondering whether your breakfast is underpowered?
🎙️ This week’s One Health Tweak a Week podcast is about protein gaps, ageing muscle, and when a simple supplement makes more sense than another lecture about whole foods.
You’ll hear:
Why protein supplements aren’t just for bodybuilders, and why some of the people most likely to benefit may never think to use them
How a healthy-looking breakfast can still fall well short of the protein dose your muscles may need as you get older
Why older adults, plant-based eaters, people losing weight, and those recovering from illness or surgery may all face the same practical problem: not enough protein on the plate
How to audit your breakfast without turning food into a spreadsheet hobby
Why the goal is a protein top-up, not swapping proper meals for shakes or falling for “high-protein” snack foods with a health halo
👉 Good company for a walk, a commute, or while looking at your cereal bowl and wondering whether it’s doing quite as much as you thought.
(Episodes are free for now. Paid subscribers support the deeper research - and unlock practical tools to help you turn the science into meals and habits that work in real life.)
🧭 Before you go
💬 Did this make you want to audit your breakfast? I’d love to hear what you found, especially if a meal you thought was “pretty good” turned out to be lighter on protein than expected.
📤 Know someone who eats lightly, is mostly plant-based, is trying to lose weight, or is getting older and quietly losing muscle? Forward this to them. A protein gap is easy to miss until strength starts slipping.
👥 Paid corner - Want help making sense of your breakfast audit? Drop me a message in our private chat, and I’ll help you think through whether your meals are clearing the protein targets we talked about here, and whether a simple top-up might be useful.
Until next Saturday - don’t let breakfast leave your muscles on hold.
– Ben