How Much Protein Do You Actually Need?

By the Strength from the Well Editorial Team · Evidence last reviewed September 2026 · Not reviewed by a licensed clinician (why we say that)

The short answer

The official recommended intake for adults is 0.8 grams of protein per kilogram of body weight per day, which is the amount set to prevent deficiency rather than the amount that is optimal. Researchers who study weight loss and aging generally suggest more, often in the range of 1.2 to 1.6 grams per kilogram, because higher intakes help preserve muscle while losing weight and help older adults hold onto it. Most healthy people can safely eat in that range, but anyone with reduced kidney function should set their target with a clinician.

Key points

The 0.8 grams per kilogram figure is a floor for avoiding deficiency, not a target for good outcomes.
During weight loss, higher protein intakes consistently protect more lean mass and improve appetite control.
Older adults need more protein than younger adults for the same effect, because muscle responds less readily with age.
Spreading protein across meals, roughly 25 to 40 grams each, works better than eating most of it at dinner.
In people with healthy kidneys, higher protein intakes have not been shown to cause kidney damage.
Protein only preserves muscle if muscle is being used. Resistance training is the other half of the equation.

Where the official number comes from

The recommended dietary allowance for protein in adults is 0.8 grams per kilogram of body weight per day. For someone weighing 70 kilograms, about 154 pounds, that is roughly 56 grams a day.

It is worth understanding what that number was designed to do. Recommended allowances are set to cover the requirements of nearly everyone in a population, with the outcome being the avoidance of deficiency, measured mostly by nitrogen balance studies. It answers the question of how little you can eat without running a deficit. It does not answer the question of how much supports the best muscle retention, the best appetite control or the best function in your seventies.

Those are different questions, and the research that addresses them tends to land on higher numbers. This is not a case of official guidance being wrong. It is a case of a number being used to answer a question it was not built for.

How much during weight loss

When you lose weight, you do not lose only fat. Some of what comes off is lean tissue, and the proportion varies with how you go about it. Protein intake is one of the two main things that shift that ratio in your favor.

Trials that compare higher and lower protein intakes during energy restriction generally find that the higher protein groups retain more lean mass for the same total weight lost, and often report better appetite control. Reviews of this literature commonly land in the range of 1.2 to 1.6 grams per kilogram of body weight for adults losing weight, with some researchers going higher for people who are very active or in a steep deficit.

For the same 70 kilogram person, that works out to roughly 85 to 110 grams a day. That is substantially more than most people eat by default, and for many it is the single biggest practical change in their plan.

For people with a lot of weight to lose, using current body weight can produce a target that is hard to reach. A common adjustment is to base it on a reasonable target weight or on lean body mass instead. This is worth setting with a dietitian rather than guessing.

Why older adults need more

Muscle responds to protein less readily with age, an effect researchers call anabolic resistance. The same amount of protein that would trigger muscle protein synthesis in a thirty year old may not do it in a seventy five year old. More is required to produce the same signal.

This matters more than it sounds like it does. Muscle mass and strength decline with age in most people, and that decline is closely tied to falls, fractures, loss of independence and slower recovery from illness. Protein intake and resistance training are the two levers with the best evidence for slowing it.

Older adults also tend to eat less overall as appetite declines, which means protein often falls at exactly the point in life when the requirement goes up. Several expert groups working on healthy aging have suggested intakes above the standard allowance for this population, commonly in the range of 1.0 to 1.2 grams per kilogram or more, with higher figures for those who are ill or recovering.

Timing and distribution

Most people eat a small amount of protein at breakfast, a modest amount at lunch, and a large amount at dinner. The research suggests spreading it more evenly does more for muscle.

The reason is that muscle protein synthesis appears to respond to a threshold rather than to a running total. A meal needs to contain enough protein, and enough of the amino acid leucine specifically, to trigger the response. Studies suggest somewhere around 25 to 30 grams of good quality protein per meal reaches that threshold for younger adults, with older adults likely needing more, perhaps 35 to 40 grams.

So a day with 20 grams at breakfast, 30 at lunch and 40 at dinner probably does more than a day with 5, 15 and 70, even though the totals are similar. In practice, breakfast is where most people have room to improve, because the traditional options are almost all carbohydrate.

Aim for a protein anchor at every meal rather than a protein dinner
Breakfast is usually the weakest meal and the easiest to fix
Eggs, Greek yogurt, cottage cheese, fish, poultry, lean meat, tofu, tempeh, lentils and beans all count
Plant sources usually need larger portions or combinations to match animal sources gram for gram
A protein supplement is a convenience, not a requirement, and food first is a reasonable default

Is high protein bad for your kidneys

This is the most common worry and it deserves a straight answer. In people with healthy kidneys, higher protein intakes have not been shown to cause kidney disease. Studies following healthy adults and athletes eating well above the recommended allowance have not found the decline in kidney function that the concern predicts.

The confusion comes from a real clinical fact pointed in the other direction: in people who already have chronic kidney disease, protein restriction is sometimes used to slow progression. That is a treatment for existing disease, not evidence that protein caused it.

So the caution is specific rather than general. If you have known kidney disease, reduced kidney function on bloodwork, a single kidney, or a condition that puts your kidneys at risk, set your protein target with your clinician. If your kidneys are healthy, eating in the ranges discussed here is well within what the evidence supports.

A few other groups should individualize: people with liver disease, people with certain rare metabolic disorders, and people who are pregnant, whose requirements are higher but differently structured.

Protein does not work alone

There is a limit to what protein does by itself. Muscle is preserved when it is both fed and used. Eating 130 grams of protein a day while sedentary during a steep deficit will still cost you muscle, just less of it.

Resistance training two or three times a week is the other half. It does not have to be a gym. Body weight work, resistance bands and loaded household tasks all provide the stimulus. What matters is that the muscle is asked to do something reasonably hard, repeatedly, over months.

This pairing matters most for two groups. Older adults, for the reasons above. And anyone losing weight rapidly, including people using a GLP-1 medication, where intake can drop so sharply that both total protein and training are easy to neglect at exactly the moment they matter most.

A practical way to set your number

Take your weight in pounds and divide by 2.2 to get kilograms. If you are maintaining and generally healthy, 1.0 to 1.2 grams per kilogram is a sensible everyday target. If you are actively losing weight, 1.2 to 1.6 is the range most of the research supports. If you are over sixty five, aim at the upper part of whichever range applies.

Then check it against reality for a few days, because most people find they are eating considerably less than they assumed. Counting protein alone, without tracking anything else, is a lighter exercise than full food logging and often the more useful one.

Bodies are worth feeding properly, not just less. Much of the advice people get about weight loss is subtractive, and protein is one of the few places where the instruction is to add something.

Common questions

Can your body only absorb 30 grams of protein at a time?

No. That figure is a misreading of research on the threshold for stimulating muscle protein synthesis, not on absorption. The digestive system absorbs far more than 30 grams; the extra is simply used for other purposes rather than maximally driving muscle building. Spreading protein out is still a reasonable idea, but a large protein meal is not wasted.

Do plant proteins work as well?

They can, with attention. Most plant sources have less leucine and a less complete amino acid profile per gram, so larger portions or a mix of sources is usually needed to reach the same effect. Soy is the closest to animal sources. People eating entirely plant based diets should generally aim toward the higher end of the ranges here.

Is protein powder necessary?

No, but it is convenient, and convenience is often what determines whether a target gets hit. Whey, casein and soy are all well studied. If you use one, choose a product that has been third party tested, since supplements are regulated less tightly than food and contamination has been documented in this category.

Will eating more protein make me gain weight?

Protein contains calories, so it can if it is added on top of everything else. In most trials where protein replaced some carbohydrate or fat rather than adding to it, people ate less overall, because protein is the most filling macronutrient. The usual approach is to substitute rather than to add.

Sources

This is information, not medical advice. Strength from the Well is an independent publisher. Nothing here is a diagnosis, a prescription, or a recommendation to start or stop any treatment. Talk to a clinician who knows your history before you act on anything you read here — including anything you read here that contradicts them.