How much protein do I need per day?

It depends heavily on body weight, activity level, and age. The official minimum (the RDA) is about 0.8 grams per kilogram of body weight, but that figure is designed to prevent deficiency, not to optimize muscle or performance. Many researchers discuss a broader range—roughly 1.2 to 2.0 grams per kilogram—for people who are physically active, with older adults often landing toward the higher end. There is no single correct number for everyone, and individual needs can vary with health status, so this is a starting point for a conversation, not a prescription.

Is eating more protein always better for building muscle?

Not necessarily. Muscle growth appears to have a point of diminishing returns for protein intake—beyond a certain threshold, extra protein is generally used for energy or other purposes rather than building additional muscle. Training stimulus, sleep, total calories, and consistency likely matter as much or more than pushing protein intake higher and higher. Evidence in this area is still evolving, so treat very high intakes as unlikely to help much rather than definitely harmful.

Do older adults need more protein than younger adults?

Many nutrition researchers believe older adults may benefit from higher protein intakes than younger adults, partly to help counter age-related muscle loss (sarcopenia) and partly because aging muscle may respond less efficiently to the protein it does get. This is generally discussed alongside resistance exercise, not as a replacement for it. Anyone with kidney disease or other conditions affecting protein metabolism should talk with a clinician before increasing intake substantially.

Is plant protein as good as animal protein?

Plant and animal proteins differ in their amino acid profiles and how efficiently the body seems to use them, with many animal sources and a few plant sources (like soy) considered more "complete." In practice, eating a variety of plant proteins across the day, or combining plant sources with even modest amounts of animal protein or dairy, appears to close most of the practical gap for most people. Total daily protein and variety may matter more than obsessing over any single food.

Jul 31, 2026 · By reConnect

How Much Protein Do You Actually Need? A Look Past the Bro-Science

Per-kilogram protein ranges by activity level and age, why older adults may need more, and how meal timing and protein quality actually fit in.

#aging #muscle-health #nutrition #plant-based-protein #protein #sarcopenia #strength-training

Ask five people how much protein they need and you will likely get five different numbers, most of them louder than the last. Social media has turned protein into a competitive sport, with intakes climbing toward levels that look more like a bodybuilder’s meal plan than everyday nutrition. Underneath the noise, though, there is a genuinely useful, fairly boring answer: your protein needs scale with body weight, how active you are, and your age—and for most people, more is not automatically better once a reasonable range is met.

The official minimum is not the practical target

The most commonly cited protein guideline is the Recommended Dietary Allowance, often described as roughly 0.8 grams per kilogram of body weight per day. It is worth understanding what that number actually represents: it is generally considered the amount needed to prevent deficiency in a mostly sedentary person, with some built-in safety margin. It was not designed to optimize strength, muscle retention, or recovery from exercise.

For someone who trains regularly, is trying to preserve muscle while losing fat, or is older and working against age-related muscle decline, that baseline figure is probably a floor, not a target. Many nutrition researchers and dietitians discuss a wider practical range—often somewhere between 1.2 and 2.0 grams per kilogram of body weight—depending on activity and goals. That is a broad range on purpose; individual response, medical history, and personal tolerance all play a role, and there is no single number that applies universally.

Matching intake to how active you actually are

A rough way to think about where you might fall in that range:

Mostly sedentary adults may do fine closer to the RDA baseline, especially if health goals do not include building or preserving significant muscle mass.
Recreationally active people—regular walking, occasional strength training, general fitness—often land in the middle of the broader range, something like 1.2 to 1.6 grams per kilogram, though this varies by individual.
People doing regular resistance training or endurance training may see benefit from intakes toward the higher end of that range, since both muscle repair and connective tissue turnover increase with training load.

These are general patterns discussed in the nutrition literature, not fixed prescriptions. Body composition goals, total calorie intake, and how a person tolerates higher-protein eating all shift where an individual might reasonably sit.

Older adults and the sarcopenia question

Aging tends to bring a gradual, natural loss of muscle mass and strength, sometimes called sarcopenia. This process seems to accelerate somewhat later in life and can affect mobility, balance, and independence over time.

A few things are commonly discussed in this context, though the science is still developing:

Aging muscle may respond less efficiently to a given amount of protein than younger muscle does, a phenomenon sometimes referred to as “anabolic resistance.” This is one reason some researchers suggest older adults may benefit from protein intakes toward or above the higher end of the general active-adult range, though individual needs vary and this is not settled science.
Protein alone does not appear to be sufficient. Resistance exercise—even light strength training—seems to matter substantially for muscle maintenance in older adults, and protein is generally discussed as supporting that stimulus rather than replacing it.
Appetite naturally tends to decline with age for many people, which can make hitting higher protein targets harder in practice, even when the target itself is reasonable. Spreading protein across meals (more on that below) may help address this.

If you are older and considering a meaningful increase in protein intake, especially alongside any kidney or metabolic conditions, it is worth discussing with a clinician or dietitian first.

Does it matter when you eat it?

There is ongoing discussion in nutrition circles about whether spreading protein evenly across meals—rather than concentrating most of it at dinner, which is common in typical Western eating patterns—may support muscle protein synthesis more effectively. The general idea is that each meal can only stimulate a certain amount of muscle-building response, so a large, protein-heavy dinner following two low-protein meals may be less efficient than a more even distribution.

This is a reasonable, low-risk practice to experiment with—aiming for a meaningful protein source at breakfast and lunch rather than saving it all for later—but it should be considered a possible refinement, not a requirement. Total daily intake still appears to matter more than precise timing for most people.

Plant protein vs. animal protein

Protein quality is usually discussed in terms of amino acid completeness and digestibility. Animal proteins (meat, fish, eggs, dairy) and a handful of plant proteins like soy are often considered more “complete,” meaning they supply the full range of essential amino acids in proportions the body can use efficiently. Many plant proteins are lower in one or more essential amino acids, though this varies by food.

In practice, this matters less than it might sound for people eating a varied diet:

Combining different plant protein sources across the day (legumes, grains, nuts, seeds) tends to cover amino acid gaps reasonably well.
Even modest amounts of dairy, eggs, or fish alongside a mostly plant-based diet can round out amino acid intake.
Total daily protein, consistency, and overall diet quality likely matter more than any single meal’s “completeness.”

Fully plant-based eaters may want to pay closer attention to variety and total intake, since some plant proteins are less concentrated per serving than animal sources, which can make hitting higher targets take more deliberate planning.

The diminishing-returns problem

Perhaps the most important thing to say about the “more is always better” reflex is that it does not appear to hold up well past a certain point. Once intake comfortably covers training demands and recovery needs, additional protein does not seem to translate into proportionally more muscle. The body appears to use surplus protein for energy or other metabolic purposes rather than storing it as muscle tissue. Extremely high intakes are not clearly established as harmful for healthy people, but they are not clearly beneficial either, and they often come at the expense of other nutrients or simple food enjoyment.

A more useful mental model: find a range that fits your activity level and age, distribute it reasonably across the day, prioritize variety, and let training—not protein powder—do the heavy lifting for actual muscle growth.

This article is for general education and is not a substitute for personalized medical or nutritional advice.