Protein is having a moment.
Walk into almost any grocery store and you will find protein-fortified everything: protein bars, protein cereals, protein shakes, protein pasta, protein chips, protein desserts and even foods that never seemed to need a protein makeover in the first place.
Social media has taken the message even further. We are told to prioritize protein at every meal, eat more protein to lose weight, eat more protein to preserve muscle, eat more protein as we age and, increasingly, that we should be eating dramatically more protein than previous generations were told to consume.
But there is an important question we don’t hear nearly as often:
How much protein do we actually need?
And perhaps an even more important question:
Does eating more protein automatically make us healthier?
The answer is considerably more complicated than the protein marketing machine would have us believe.
Protein is essential—but more isn’t automatically better
Let’s start with something that isn’t controversial: we absolutely need protein.
Protein provides amino acids that our bodies use to build and repair tissues, produce enzymes and hormones, support immune function and maintain muscle.
The problem isn’t protein.
The problem is the assumption that because something is essential, more of it must therefore be better.
We don’t apply that logic to every other nutrient. We don’t assume that because we need vitamin A, taking enormous amounts of vitamin A is better. We don’t assume that because we need iron, more iron is automatically healthier.
Protein deserves the same nuance.
The traditional Recommended Dietary Allowance for healthy adults has been around 0.8 grams of protein per kilogram of body weight per day. That number is intended to cover the needs of most healthy people, not necessarily to represent an ideal target for every individual.
And this is where things get interesting.
Dr. Christopher Gardner questions the protein arms race
Christopher Gardner, PhD, is a nutrition scientist at Stanford who has spent decades studying dietary patterns and health.
In a recent Stanford discussion about protein, Gardner challenged the idea that the science suddenly changed enough to justify the enormous increase in protein recommendations and marketing.
The current federal dietary guidance has moved toward substantially higher protein intakes—roughly 1.2 to 1.6 grams per kilogram for many adults—but Gardner points out that there wasn’t a sudden scientific discovery demonstrating that everyone needs this much protein.
His larger concern is that protein has become one of the most heavily marketed nutrients.
And that matters.
Because when a nutrient becomes a marketing category, the conversation can subtly change from:
“Do you get enough?”
to:
“How much more can we sell you?”
Those are very different questions.
Most Americans aren’t suffering from a protein deficiency
For many people eating a reasonably varied diet, getting enough protein isn’t particularly difficult.
Gardner has previously pointed out that many Americans consume considerably more protein than they require, leaving substantial room to reduce overall protein intake while still meeting individual needs. He has also argued that shifting some protein intake from animal foods toward plant foods could be beneficial both for health and environmental reasons.
This doesn’t mean everyone should eat less protein.
Athletes, people doing substantial resistance training, older adults, people recovering from illness, and individuals with particular medical or nutritional needs may have higher protein requirements.
That distinction is important.
“Most people probably don’t need enormous amounts of protein” is not the same statement as “nobody benefits from higher protein intake.”
Nutrition rarely works in absolutes.
What about muscle and aging?
This is where the protein conversation becomes genuinely interesting.
One legitimate reason for paying more attention to protein as we age is muscle preservation.
Skeletal muscle becomes increasingly important as we get older. Maintaining muscle strength and function is associated with independence, mobility and quality of life.
Some researchers argue that the traditional 0.8 g/kg recommendation may underestimate protein needs for older adults, particularly when the goal is maintaining muscle. A 2023 review of protein recommendations for healthy muscle aging concluded that newer methods of estimating protein requirements suggest that recommendations may need to be above 1.0 g/kg/day for some older adults.
But notice something important.
The discussion isn’t simply:
MORE PROTEIN = BETTER HEALTH
It is about context.
Protein intake needs to be considered alongside age, activity level, resistance exercise, total energy intake, protein source, meal distribution and overall diet quality.
That is a much more useful conversation.
Protein powder isn’t a health food category
This is another place where we should slow down.
Protein is a nutrient—not a food.
A lentil contains protein.
So does a soybean.
So does a peanut.
So does a piece of tofu.
So does a steak.
And so does a protein bar.
But those foods aren’t nutritionally equivalent simply because they contain the same macronutrient.
A whole-food protein source can come packaged with fiber, minerals, phytochemicals, healthy fats and other compounds.
A highly processed protein product may instead come with sweeteners, isolated ingredients, additives and a substantial amount of calories.
This doesn’t mean protein powder is inherently bad. It can be useful, particularly when someone has difficulty meeting their needs through food.
But protein content alone shouldn’t be used as a proxy for nutritional quality.
Plant protein vs. animal protein: the source matters
This is perhaps the most important part of the protein conversation.
If someone tells you:
“Protein is protein.”
That is technically true at one level—but nutritionally incomplete.
The food carrying that protein matters.
A growing body of research has examined what happens when plant protein replaces animal protein.
A large 2020 systematic review and meta-analysis published in the BMJ looked at 32 prospective cohort studies involving more than 715,000 participants. Higher plant protein intake was associated with lower risk of all-cause mortality and cardiovascular mortality. The researchers concluded that replacing foods high in animal protein with plant protein could be associated with greater longevity.
Another very large U.S. cohort study involving more than 400,000 participants found that greater plant protein intake was associated with modestly lower overall mortality. Replacing just 3% of energy from animal protein with plant protein was associated with lower overall and cardiovascular mortality.
There is also evidence from systematic reviews of randomized trials suggesting that replacing animal protein with plant protein can improve LDL cholesterol and total cholesterol, although the evidence concerning long-term disease outcomes is less definitive.
None of this proves that every gram of animal protein is harmful.
It doesn’t.
There are studies that don’t find a harmful association between animal protein intake and mortality, including more recent analyses.
What the research increasingly suggests is something more nuanced:
The question isn’t simply how much protein you eat. It’s what foods provide that protein and what those foods replace.
The protein “replacement” problem
Imagine two people eating 100 grams of protein per day.
Person A gets most of it from:
- Lentils
- Beans
- Tofu
- Tempeh
- Soybeans
- Whole grains
- Nuts
- Seeds
- Vegetables
Person B gets most of it from:
- Processed meat
- Large quantities of red meat
- Protein bars
- Protein shakes
- High-protein packaged foods
- Cheese
Both may technically be eating a high-protein diet.
But their diets are profoundly different.
They differ in fiber.
They differ in saturated fat.
They differ in phytochemicals.
They differ in micronutrients.
They differ in food processing.
They differ in the foods being displaced from the diet.
And potentially, they differ in long-term health consequences.
That is why looking at protein grams in isolation can be misleading.
Are high-protein diets dangerous?
This is where we need to avoid sensationalism.
There isn’t good evidence that eating a moderately higher amount of protein automatically causes disease in otherwise healthy people.
The evidence surrounding very high protein intakes and long-term health is considerably more complicated.
There are also legitimate concerns for people with certain medical conditions, particularly existing kidney disease, where protein intake may need to be individualized with a healthcare professional.
But it would be inaccurate to tell healthy people:
“High protein diets will damage your kidneys.”
The science doesn’t support such a blanket statement.
Likewise, it would be inaccurate to say:
“Eat as much protein as possible because your body needs it.”
The science doesn’t support that either.
The sensible position is somewhere in the middle.
What about protein and weight loss?
Protein can absolutely be useful for weight management.
Protein tends to be satiating, and maintaining adequate protein while losing weight can help support lean mass—particularly when combined with resistance training.
But this doesn’t mean that a high-protein diet is inherently superior to every other dietary pattern.
Gardner’s famous DIETFITS trial, published in JAMA, randomized 609 adults with overweight or obesity to either a healthy low-fat or healthy low-carbohydrate diet. After 12 months, there was no significant difference in weight loss between the groups.
The bigger lesson wasn’t that carbohydrates or fat “won.”
It was that diet quality matters more than simplistic macronutrient tribalism.
The same principle applies to protein.
A diet shouldn’t be judged solely by how many grams of protein it contains.
We may be asking the wrong question
Perhaps instead of asking:
“How can I get more protein?”
we should sometimes ask:
“How can I build a nutritionally complete diet that naturally provides enough protein?”
That is a very different approach.
Consider a meal of lentils, brown rice, vegetables, greens, herbs and seeds.
It provides protein.
But it also provides fiber.
Complex carbohydrates.
Minerals.
Phytonutrients.
And a huge variety of compounds that don’t appear on the protein percentage of a nutrition label.
Or consider tofu with vegetables, mushrooms and whole grains.
Again: protein.
But protein isn’t the only story.
Do vegans need to worry about “incomplete protein”?
This is another protein myth that refuses to die.
The idea that plant proteins are “incomplete” and therefore need to be carefully combined at every meal has been dramatically overstated.
As Gardner explains, plant foods contain all 20 amino acids. Individual plant foods may have different proportions of essential amino acids, but someone eating a varied diet generally does not need to obsess over combining specific proteins at every meal.
Beans don’t have to be eaten with rice in the same bite for the meal to “count.”
Your body doesn’t operate according to Instagram infographics.
Over the course of the day, a varied diet can provide the amino acids you need.
So how much protein do we actually need?
There isn’t one magic number.
Your protein needs depend on factors including:
- Body size
- Age
- Physical activity
- Resistance training
- Pregnancy or lactation
- Energy intake
- Health status
- Muscle mass
- Goals such as weight loss or muscle gain
For a healthy sedentary adult, the traditional baseline of approximately 0.8 g/kg/day provides a useful reference point.
Someone who is older, highly active or specifically trying to build or preserve muscle may reasonably require more.
But that doesn’t mean everyone needs to chase 150 or 200 grams of protein every day.
For many people, the question isn’t:
“How do I get enough protein?”
It’s:
“Why am I making protein the center of my entire diet?”
The bigger problem with the protein craze
There is a subtle nutritional trap happening right now.
When people become obsessed with increasing one nutrient, they often unintentionally crowd out others.
A person eating enormous amounts of protein may eat fewer:
- Fruits
- Vegetables
- Whole grains
- Beans
- Legumes
- Nuts
- Seeds
- Fiber-rich foods
And this is particularly ironic because many of the foods being displaced are themselves sources of protein.
Lentils aren’t just protein.
Chickpeas aren’t just protein.
Oats aren’t just carbohydrates.
Nuts aren’t just fat.
Food is not a collection of isolated nutrients.
It is a package.
And health is built from dietary patterns—not from winning the protein Olympics.
Protein quality may matter more than protein quantity
A useful way to think about protein is:
quantity + quality + context.
How much are you eating?
Where is it coming from?
What nutrients come along with it?
What foods is it replacing?
Are you exercising?
Are you getting enough calories?
Are you eating enough fiber?
Are you eating enough fruits and vegetables?
Are you getting adequate micronutrients?
Are you sleeping?
Are you maintaining muscle through resistance exercise?
Those questions are much more meaningful than simply counting protein grams.
So…are we overdoing protein?
For some people, probably.
Not because protein is toxic.
Not because protein is bad.
And certainly not because everyone should suddenly restrict protein.
Rather, we may be overemphasizing protein at the expense of thinking about the entire diet.
The protein obsession has turned a legitimate nutritional requirement into a marketing opportunity.
And the result is that people who are already getting plenty of protein are being encouraged to consume even more.
Meanwhile, the foods that provide protein naturally—beans, lentils, peas, soy foods, whole grains, nuts and seeds—are sometimes treated as though they are somehow inadequate unless they are transformed into a protein powder, bar or fortified product.
That doesn’t make much nutritional sense.
The better question isn’t “How much protein?”
It’s:
“What kind of diet gives my body everything it needs?”
For most healthy people, that means a varied diet built around minimally processed foods.
Protein matters.
But so do fiber, vitamins, minerals, healthy fats, complex carbohydrates and thousands of beneficial compounds that don’t come with a protein marketing campaign attached to them.
And if your diet is predominantly or entirely plant-based, you don’t need to live in fear of protein deficiency.
Beans, lentils, peas, tofu, tempeh, soybeans, nuts, seeds and whole grains can make meaningful contributions to protein intake.
You don’t have to turn every meal into a bodybuilding competition.
The bottom line
Protein is essential. More protein isn’t automatically better.
The latest protein conversation should not be about fear—either fear that we’re eating too little or fear that eating more protein will inevitably harm us.
It should be about context.
For someone who is older and losing muscle, increasing protein may be sensible.
For someone training intensely, more protein may be useful.
For someone eating very little protein, increasing it makes sense.
But if you’re already eating a varied diet and getting adequate protein, adding another shake, bar or fortified snack simply because the package says “30 grams of protein” may not make your diet healthier.
And perhaps that’s the biggest lesson from the current protein craze:
We don’t need to stop eating protein. We need to stop treating protein as though it is the only nutrient that matters.
Health isn’t built one macronutrient at a time.
It’s built from the whole pattern of how we eat.
A note on the science
The most defensible conclusion is therefore not that “animal protein is bad” or “high protein is dangerous,” but that protein requirements vary and the overall quality and source of the protein-rich foods matter.
If you have kidney disease or another medical condition that affects protein requirements, protein intake should be discussed with your physician or registered dietitian rather than determined from general nutrition advice.
Sources and further reading
Christopher Gardner, Stanford Medicine — protein requirements and the modern protein debate.
Gardner et al., JAMA — DIETFITS randomized clinical trial.
Naghshi et al., BMJ — systematic review and meta-analysis of plant and animal protein and mortality.
Song et al., JAMA Internal Medicine — plant and animal protein intake and mortality.
Nutrition Society review — dietary protein recommendations and healthy muscle aging.
