Are You Eating Enough Protein? The Number Changed This Year
Ask a room full of adults whether they eat enough protein and almost every hand goes up. Protein is the macronutrient nobody worries about. It is also the one where the official recommendation moved this year, by a wide margin, and very few people have heard about it.
The honest answer to the question in the title, for most people over forty, is this: you are almost certainly eating enough protein to avoid a deficiency, but probably not enough to keep the muscle you are going to want in your seventies. Those are two different numbers. The distance between them is what this article is about.
The number most people are working from is out of date
For twenty years the reference figure for protein has been 0.8 grams per kilogram of body weight per day, which is a little over a third of a gram per pound. For a 180 pound adult that works out to about 65 grams a day.
That figure was never a target for building or keeping muscle. It is the amount that prevents a deficiency in a healthy adult, which is a much lower bar than the one most of my patients actually care about.
In January, the 2025-2030 Dietary Guidelines for Americans moved well past it. Adults are now advised to take in 1.2 to 1.6 grams per kilogram per day, which is roughly 0.55 to 0.75 grams per pound, or about 100 to 130 grams a day for that same 180 pound adult. That is 50 to 100 percent more protein than the old allowance, which still stands as the formal RDA.
Not everyone agrees with the new range. A Perspective in the Journal of Nutrition argued that the evidence is not broad enough to support one higher target for every adult across the lifespan, and others have pointed out that most Americans already clear the old allowance without trying. I think both things are true. The case for the higher range is strongest in the people I see most, adults over forty working to hold onto muscle and anyone losing weight. It is weaker as a blanket number for everybody.
Total matters, and timing is where most people lose it
Daily total is still the main thing. For adults doing resistance training, the gains from adding more protein flatten out around 0.7 grams per pound per day, with up to a full gram per pound defensible if you are training hard and trying to add muscle.
Get the total right and you have done most of the work. What remains is where it lands, because muscle is not built from a running tally at the end of the day. It is built meal by meal, and each meal has a threshold to clear.
That threshold is about 30 to 40 grams of high-quality protein, three or four times a day, from sources like eggs, meat, fish, dairy or whey. A meal that comes in well under it does not fully switch on the muscle-building response, regardless of how the day's total looks.
Spread matters, and there is a trial that isolates it. When researchers fed adults the same daily protein total either evenly across three meals or concentrated at dinner, the even pattern produced about 25 percent more muscle protein synthesis over 24 hours. Same food, same total, different result.
Now consider how most people actually eat. Toast or cereal in the morning, something light at midday, and the great majority of the day's protein at dinner. That pattern can hit a perfectly good daily number while clearing the per-meal threshold exactly once. If your day looks like that, fixing the shape of it is a better first move than raising the total.
After forty, the per-meal dose has to go up
Here is the part that surprises people. The same amount of protein does less for you as you get older. The muscle becomes less responsive to the signal, which is called anabolic resistance, and it starts well before anyone feels old.
The research on this is specific. Older adults needed close to twice as much protein in a single meal as younger men to get the same maximal muscle-building response. Not slightly more. Close to double.
The practical consequence runs against instinct. People tend to eat lighter as they age, and to spread smaller amounts of food across the day. For protein, that is the wrong direction. Someone over forty should be sitting at the top of the per-meal range, closer to 40 grams than 30, rather than grazing on meals that never clear the threshold.
One caution on the higher numbers.Intakes in this range are well tolerated in healthy adults, but reduced kidney function changes the conversation entirely. If you are over sixty, or diabetic, or have any history of kidney disease, I recommend checking kidney function before moving to the upper end, and adjusting from there. Hydration matters more at higher intakes as well.
If you are moving toward plant-based eating, plan the protein first
A trial published this year makes this concrete. Researchers followed 72 healthy adults aged 65 and over for twelve weeks, randomized to a self-selected vegan diet, their usual omnivorous diet, or the vegan diet plus resistance training.
Protein intake in the vegan groups dropped by nearly 28 grams a day in the first week, and was still down about 19 grams at twelve weeks. The participants never corrected it on their own. Muscle followed: thigh muscle volume and lean mass in the arms and legs both fell measurably on the vegan diet while holding steady on the omnivorous one, measured by MRI and DEXA rather than by a bathroom scale. The group that added resistance training lost roughly half as much, which is meaningful, but still lost muscle.
The muscle loss is real. What drove it, though, was a protein intake that fell and stayed down, in groups that were self-selected and unsupervised. No group ate a plant-based diet built to hit the protein target.
So the variable worth managing is protein adequacy and training, not whether animal products are on the plate. If you are considering this change, set the protein floor before you make the switch rather than after it stops working.
Protein is the material. Training is the signal.
Protein alone does not build muscle. Without a reason to build, most of the extra gets burned for energy or stored, and the scale moves in a direction nobody wanted. Resistance training is what directs protein toward muscle instead.
The two together are more than the sum of the parts, and the clearest demonstration comes from people losing weight. In a calorie deficit with training, a group eating about 1.1 grams of protein per pound gained more lean mass and lost more fat than a group eating half that. Not held steady. Gained, while losing weight.
That combination is the whole ballgame for anyone on a GLP medication, where a substantial share of the weight lost can come out of muscle. I wrote about protecting muscle during that kind of weight loss a few weeks ago. I will take strength training on its own terms shortly.
Where this fits at Four Pillars
What we do here is build a wellness plan around your goals, and a protein target is part of it: a specific number set against your body composition and what you are working toward, rather than a figure off a chart.
That is also why we keep a body composition analyzer in the office. When someone is losing weight, scale weight cannot tell you what left, and the difference between twenty pounds of mostly fat and twenty pounds of fat and muscle together is the difference between a good outcome and a problem you will be unwinding for years. Measuring it over time removes the guesswork.
The takeaway
Three numbers are enough to act on. Somewhere around 0.55 to 0.75 grams of protein per pound of body weight per day. Thirty to forty grams per meal, three or four times a day. And if you are over forty, the top of that per-meal range rather than the bottom.
Hitting all three usually means rebuilding the shape of the day rather than adding to it, and what that takes depends on where you are starting. For most people the morning meal is the weakest link and the place to look first, though it is rarely the only change needed. Pair the protein with resistance training, which is what decides whether it becomes muscle.
If you would like a protein target set against your own body composition and goals, or know someone who would, I would be glad to talk it through. Book a call. Or call the office at 609-277-2801.
This article is for educational purposes and is not medical advice or a substitute for care from a licensed provider. Decisions about medications, supplements and your health should be made with a qualified clinician who knows your history.
