How Much Protein Per Day? The Honest 2026 Answer
The 0.8 g/kg RDA is the floor, not the goal. Here is what the actual research says — and what changes if you lift, cut, or just turned 60.
If you have asked Google "how much protein per day?" in the last decade, you have probably seen one of two extremes. Either "0.8 g per kg of body weight is plenty" — the USDA RDA — or "you need a gram per pound, bro," which is fitness-influencer math from the 90s. Neither is wrong on purpose, but neither answers the real question.
What the RDA actually means
The 0.8 g/kg figure was set by the Food and Nutrition Board to prevent overt deficiency in a sedentary adult. Translation: it is the minimum to avoid losing nitrogen balance, not the optimal intake for someone who lifts, runs, or wants to keep their muscle past 60. Treating it as a target is like setting your room temperature to "won't kill you" instead of "comfortable."
What active people actually need
The International Society of Sports Nutrition's 2024 position stand is the cleanest summary of recent meta-analyses. For people doing resistance training, the optimal range is 1.4 to 2.0 g per kg of body weight. For a 70 kg lifter, that is 100 to 140 g per day — roughly double what the RDA suggests. The American College of Sports Medicine lands in the same neighborhood.
If you are in a calorie deficit and trying to keep muscle, the upper bound climbs. Recent work by Helms and colleagues recommends 2.0 to 2.4 g/kg during a cut, especially for already-lean athletes. Above 2.4 g/kg, the data flatlines: you are not getting more muscle, you are just paying more for chicken.
What it looks like on a plate
Numbers are abstract. A practical 130 g day for a 70 kg adult might be one chicken breast (40 g), three eggs (18 g), one cup of Greek yogurt (15 g), one scoop of whey (25 g), and a 200 g tin of tuna (40 g). That is more than most people eyeball, which is why protein tracking apps almost always reveal a 30-40 g shortfall.
The 60+ exception
Older adults face a phenomenon called anabolic resistance: aging muscles need more leucine to trigger protein synthesis. The PROT-AGE study group recommends a minimum of 1.2 g/kg for healthy seniors, and 1.5 g/kg for those who are active or recovering from illness. Just as importantly, each meal should hit at least 30 g of protein to clear the leucine threshold.
Distribute it across meals
Total daily protein is the biggest variable, but distribution matters too. Most studies show 3 to 5 meals containing 0.4 g/kg each maximize 24-hour muscle protein synthesis. A 2023 McMaster paper put a torpedo in the "30 g per meal cap" myth — a single 100 g meal still raised synthesis higher than a 25 g meal — but the practical advice is still spread, not stack.
How to use this
Plug your weight, goal, and activity into the protein intake calculator. It will give you a personalized number, plus an honest range showing where you sit between RDA, ISSN, and ACSM benchmarks. From there, build a couple of go-to high-protein meals you actually like — that is the only sustainable answer.