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You need more protein at seventy than you did at forty

Aging blunts your appetite and your muscle's response to food at the same time. The number to hit, and how to hit it without forcing meals down.

By Marcus Vale · Editor-in-Chief6 min read
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You need more protein at seventy than you did at forty

Take your body weight in pounds and multiply it by 0.5. That's a reasonable daily protein floor in grams. A 185-pound man lands at about 93 grams. If you're lifting seriously, or you're recovering from surgery, push toward 0.6 and call it 110.

Now go add up what you actually ate yesterday. Most men over sixty who do this honestly come up somewhere between 55 and 70 grams, and they're surprised, because they eat meat at dinner and figure that covers it. It doesn't.

The RDA was never a performance number

The official Recommended Dietary Allowance for protein is 0.8 grams per kilogram of body weight, which works out to roughly 0.36 grams per pound. That figure was set as the amount needed to keep a healthy adult out of deficiency. It's a floor built to prevent a problem, not a target built to hold muscle on a 72-year-old frame.

The PROT-AGE expert group, a panel of geriatric nutrition researchers, recommends healthy older adults aim for 1.0 to 1.2 grams per kilogram, and more for those who are ill or training hard. The European clinical nutrition society, ESPEN, lands in the same neighborhood. That's the gap between what's printed on a food label and what the people who study aging muscle actually advise.

Why higher? Anabolic resistance. Feed a 25-year-old 20 grams of protein and his muscle-building machinery fires up. Feed the same 20 grams to a 70-year-old and the response is weaker. The muscle still listens, it just needs someone to speak louder. So you eat more per sitting to get the same signal.

Meanwhile, your appetite quit on you

Geriatricians have a name for this: the anorexia of aging. Several things stack up at once.

Your stomach empties more slowly, so you feel full sooner and stay full longer. Taste and smell both fade, which strips the pleasure out of food you used to look forward to. Common prescriptions, including blood pressure medications and metformin, can flatten appetite or leave a metallic taste. Teeth get tender. And if you're eating alone most nights, the whole ritual shrinks down to whatever's fastest.

So you need more protein and you want less food. That's the trap. You don't get out of it by white-knuckling bigger portions. You get out of it by making the food you do eat denser in protein, and by spreading it across the day instead of dumping it all on the dinner plate.

Breakfast is the meal that's broken

Here's the typical shape of an older man's day: toast and coffee for breakfast, maybe 8 grams. A sandwich or soup at lunch, maybe 20. Then a pork chop, a potato and green beans at dinner, 45 or 50 grams in one sitting.

Total's not terrible. Distribution is awful.

Your body can only use so much protein for muscle repair at one sitting. The rest gets burned for energy or shuffled off elsewhere. The working target most researchers use is 25 to 30 grams per meal, three times a day, because that's about the dose that clears the threshold for triggering muscle protein synthesis in an older adult. One giant dinner doesn't make up for a breakfast of jam and butter.

Fix breakfast first. It's the cheapest win on the board.

  • Three eggs scrambled: about 19 grams. Add a slice of cheddar and you're at 25.
  • One cup of low-fat cottage cheese: 24 to 28 grams, depending on the brand. Check the tub, they vary a lot.
  • Greek yogurt, 7-ounce container: 17 to 20 grams. Stir in a spoonful of peanut butter for another 4.
  • Milk instead of water in oatmeal: adds 8 grams and takes zero extra effort.

The numbers worth memorizing

You don't need an app. You need about eight foods and their protein counts in your head.

  • 4 ounces of cooked chicken breast: 35 grams
  • A 5-ounce can of tuna, drained: 26 grams
  • 4 ounces of cooked 85/15 ground beef: 28 grams
  • One large egg: 6 grams
  • One cup of milk: 8 grams
  • One cup of cottage cheese: 25 grams
  • Half a cup of cooked lentils: 9 grams
  • One scoop of whey protein: 24 grams

Once you know those, you can build a 100-gram day in your head standing at the refrigerator. Three eggs and milk in the morning. Tuna and a glass of milk at noon. A chicken breast at dinner. That's 100 without a single supplement.

Powder isn't cheating, it's groceries

A two-pound tub of whey runs roughly $30 to $45 and gives you somewhere around 25 to 30 servings. That's a bit over a dollar for 24 grams of protein, which is cheaper per gram than most meat at the counter.

The reason it matters at your age isn't gym culture. It's that a shake goes down when a plate doesn't. On the days when you're not hungry, when your mouth tastes like pennies from whatever the cardiologist prescribed, when you got home at eight and cooking sounds like a chore, you can drink 30 grams in ninety seconds and not lose the day.

Whey isolate sits easier if regular whey leaves you gassy. If dairy's out entirely, pea protein works and tastes better than it did ten years ago. Buy unflavored and put it in coffee, or buy vanilla and blend it with a banana. Don't overthink the brand.

Protein without lifting is mostly just calories

This is the part people skip. Eating 110 grams a day and sitting in a recliner doesn't build anything. Protein is the raw material. Resistance training is the work order.

Two full-body sessions a week is enough to change the math. Squats to a chair, a row, a press, a hinge, carrying something heavy. Hit the protein on training days especially, and get 25 or 30 grams within a couple of hours of finishing.

If you're doing one and not the other, do the training. Muscle responds to load even on mediocre nutrition. It doesn't respond to good nutrition alone.

What goes wrong, and who to ask

Protein is filling, which is exactly the problem you're trying to solve. Two fixes: put the protein on the plate first and eat it before the vegetables, and get some of your intake in liquid form, where satiety hits later.

If you've got chronic kidney disease, this whole article needs a different number, and only your nephrologist can give it to you. Same if you're on dialysis, where requirements often go up rather than down. Diverticulitis, swallowing trouble, a recent hospitalization, any of it is worth a sit-down with a registered dietitian. Ask your doctor for a referral by name. Medicare covers medical nutrition therapy in some circumstances, and it's worth asking about.

The one thing you shouldn't do is eyeball it forever. Write down everything you eat for seven days, just once, with the grams. It takes four minutes a day and you'll never have to wonder again.

Why you're really doing this

Two weeks flat on your back after a hip replacement will cost you muscle it takes a year to rebuild. Everybody who's been through it knows this. The reserve you show up with is the reserve you get to spend.

You're not eating protein to look good in a shirt. You're eating it so that when something knocks you down at 78, there's enough of you left to get back up.

This is general information to help you think things through, not medical, legal or financial advice. Please check with your doctor, pharmacist or a qualified adviser before making a change.

Marcus Vale

Editor-in-Chief

Twenty years in magazines, most of it deciding what to cut. Writes about work, discipline and the decisions that compound.

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