Here's the number, up front: most healthy adults over 40 should be aiming for roughly 1.0 to 1.2 grams of protein per kilogram of body weight per day — the higher end if you're active. For a 150-pound (68 kg) woman, that's about 82 grams a day, or roughly 27 grams at each of three meals.
That figure comes from the PROT-AGE Study Group, an international expert panel whose position paper is the most-cited source on the question, and ESPEN's expert group arrived at the same range independently. It is meaningfully higher than the 0.8 g/kg RDA most of us absorbed somewhere along the way — a number that describes the minimum required to avoid a deficit, not the amount associated with holding onto muscle.
So the information is available and it isn't complicated. And yet the most common outcome, in our experience and in the data, is a person who knows the number and misses it most days. That's not a knowledge failure. It's a scheduling failure.
Adults lose roughly 3 to 8 percent of muscle mass per decade after age 30, and the rate accelerates later — older adults lose somewhere around 0.7 to 0.8 percent per year. Nothing about that is dramatic day to day, which is exactly why it goes unnoticed until something reveals it: a set of stairs, a suitcase, a season of tennis that hurts more than it used to.
Two other things tend to shift in the same window, and they're practical rather than clinical. Appetite often changes shape — not necessarily smaller, but differently distributed, with less interest in a substantial breakfast and more grazing later. And the day itself gets more crowded, in the specific way a mid-life schedule gets crowded: other people's needs bracketing your own.
Put those together and you get the pattern we see constantly. The requirement went up. The realistic opportunity to meet it went down.
Run an ordinary day at 1.2 g/kg and the shortfall is almost never at dinner.
A typical dinner — chicken, fish, a piece of steak, a bowl with beans and cheese — lands somewhere between 30 and 45 grams without much effort. Most people are fine there.
Breakfast is where it starts going wrong. Coffee and toast is about 6 grams. Oatmeal with fruit is about 8. Yogurt helps, if it's the strained kind and you eat a real portion. Then lunch, if it's a salad, a soup, or whatever was in the fridge at 1:15, tends to come in between 12 and 20.
Add it up: roughly 25 grams by mid-afternoon, and 55 grams left to find in one evening meal. Nobody does that consistently, and the attempt is where most protein plans quietly end.
The gap is almost always in the first half of the day, and it's usually one serving wide. That's an important reframe, because "eat more protein" sounds like a diet and "add 25 grams before 2 p.m." sounds like a task.
Protein quality is worth exactly one paragraph, because it's easy to overstate and easy to ignore.
Muscle protein synthesis is triggered in part by leucine, an amino acid that has to clear a threshold in a given serving to do its job — a figure commonly cited at around 2.5 grams. A 20-gram serving of whey protein isolate typically delivers about 3 grams of leucine. Soy isolate comes in closer to 2.4 grams — right at or under the line. Collagen, whatever else it offers, is not a complete protein and doesn't perform this particular job at all.
This is a comparison between protein types, not between brands, and it matters most in exactly the situation this post describes: when you have a limited number of servings to work with, each one should count.
1. Front-load, don't back-load. Move one substantial protein serving before noon and the rest of the day stops needing to be heroic. This is the single highest-yield change available to most people over 40.
2. Attach the serving to something that already happens. Not a new routine — an existing one. The drive to work, the second coffee, the walk back from drop-off. Habits that need their own slot lose to whatever else claims that slot.
3. Remove every step you can. Anything requiring a blender, a clean shaker, and a countertop is three dependencies deep, and busy weeks break dependencies first. The serving that gets consumed is the one that takes a single motion.
MYND Sparkling Protein Water was built for the first-half-of-the-day gap specifically: 20 grams of whey protein isolate, zero sugar, 12 clear ounces, cold, no blender, nothing milky or thick to work around when a heavy shake is the last thing that sounds good at 9 a.m.
It isn't a meal and it isn't meant to be one. It's the serving that closes a gap you've already identified — which, for most people over 40, is the entire job.
The MYND take-away: After 40, the protein problem is rarely that you don't know the number. It's that no part of your day was designed to deliver it. Fix the design, not the discipline.
