The Question Everyone Asks

Here’s a conversation I’ve had more times than I can count.

A patient has just spent thirty minutes telling me about their fatigue, their digestion, their weight. We’ve talked through what they’re eating, how they’re sleeping, how stressed they are.

I mention shifting toward a whole-food, plant-based diet — which the research strongly supports for their issues — and then, inevitably, comes the question:

“But where am I going to get my protein?”

I understand why people ask. We’ve been hearing about protein our whole lives. Red meat builds muscle. Animal protein fuels the brain. Without it, the thinking goes, you’ll be a tired, foggy, hormone-depleted mess.

It feels like a responsible question.

But here’s the thing: if a plant-based diet truly couldn’t meet your protein needs, no one would survive on one. And yet, hundreds of millions of people do — and quite well.

Let me show you the numbers.

How Much Protein Do You Actually Need?

After years working with patients and studying the nutrition research, I’ve come to see the protein question differently.

It’s not really about science.

It’s about fear. And like most fears, it dissolves quickly when you look at the actual data.

The U.S. Recommended Dietary Allowance (RDA) and the World Health Organization have long set the adult protein requirement at 0.8 grams per kilogram of body weight per day — about 60 grams for an average adult male.

As of early 2026, updated U.S. dietary guidelines raised that number to 1.2 to 1.6 grams per kilogram — a significant jump that has nutrition scientists actively debating whether the new standard reflects genuine new evidence or an overcorrection.

Christopher Gardner, director of nutrition studies at Stanford, put it bluntly: “Were we really off by that much? What new evidence became available to show that we were off by that much?”

Here’s what both sides agree on, though: most Americans are already meeting even the higher target. And if you’re eating a varied, whole-food diet — plant-based or otherwise — you’re almost certainly fine.

Not a gram per pound of body weight, like your friend Mike claimed when he got into weightlifting. Not 100 grams. Not “as much as possible.”

Broccoli, Lentils, and Potatoes — Oh My

Here’s where people’s jaws tend to drop.

Start with broccoli — the vegetable nobody associates with protein. At 2,000 calories, broccoli alone would give you well over 150 grams of protein. Nobody is eating 2,000 calories of broccoli, of course, but I think you get the point: even foods we think of as purely “healthy” are quietly packed with protein.

Lentils are less surprising, but the numbers are still striking — roughly 157 grams of protein per 2,000 calories, nearly three times the daily requirement.

And even plain potatoes — yes, the humble carb everyone fears — come in at 50 to 60 grams of protein at 2,000 calories.

In other words, you could eat potatoes for breakfast, lunch, and dinner and still meet your daily protein needs.

As Dr. Michael Klaper M.D., a physician with over 40 years of clinical experience as a general practitioner puts it: “If you are eating 2,000 calories in whole plant foods, you are guaranteed of getting 60, 70, 80 grams of high-grade protein with all the amino acids you need. You can’t avoid it. It’s in the food.”

A typical day of potatoes, rice, beans, vegetables, and fruit will comfortably exceed your minimum protein needs — without you have to track a single gram.

The “Incomplete Protein” Misunderstanding

You may have heard that plant proteins are “incomplete” — that they lack certain essential amino acids and therefore can’t properly fuel the body. This idea, while still floating around in gyms and wellness blogs, is outdated.

The late Dr. John McDougall M.D., a pioneering physician who spent five decades studying the relationship between diet and disease, was direct about it: “There has never been a case of protein deficiency ever reported to occur in humans on natural diets. All natural plant foods contain enough total proteins, and individual amino acids, to always meet our nutritional needs.”

When you eat a variety of grains, vegetables, and legumes over the course of a day, your body draws from a circulating amino acid pool and assembles what it needs. You don’t need to carefully combine foods at each meal. The human body is far smarter than that.

In practical terms: protein deficiency simply does not occur in people eating enough calories from whole plant foods.

What is far more common in Western societies is the opposite problem — too much protein.

The Real Problem: Too Much Protein

We live in a culture that equates more protein with more strength, better health, and longer life. But our actual physiological needs are more modest than YouTube influencers would have you believe.

When protein intake far exceeds what the body needs, the excess doesn’t just disappear. The liver and kidneys must work harder to process and excrete the additional nitrogen. And there’s a more troubling finding worth knowing about.

Dr. T. Colin Campbell, professor emeritus at Cornell University and one of the most respected nutrition researchers of the past half century, got his start studying the relationship between protein and cancer.

In a landmark series of experiments, he found that rats exposed to a carcinogen developed liver cancer when their diet consisted of 20% animal protein — but remained virtually tumor-free when protein dropped to 5%.

As Campbell described it, he could control cancer in those rats “like flipping a light switch on and off,” simply by altering the amount of animal protein they consumed. Critically, when he repeated the experiments using plant proteins like wheat and soy at the same levels, the cancer-promoting effect disappeared entirely.

His work, later expanded into the landmark book The China Study, helped establish that the relentless pursuit of more animal protein may not only be unnecessary — for some people, it may carry real risks.

It’s Not Just Protein — It’s the Whole Package

We don’t eat isolated nutrients. We eat food — and food comes as a package deal.

The typical high-protein foods in the Western diet — red meat, processed meats, cheese, eggs — arrive bundled with saturated fat, cholesterol, and zero fiber. Plant protein sources like beans, lentils, and whole grains come packaged with fiber, antioxidants, and phytonutrients — and no cholesterol.

When you change your protein source, you’re not simply swapping one number on a nutrition label. You’re changing the entire metabolic impact of your diet.

A Personal Note

For most of my adult life, I followed a low-carb, higher-protein diet. I was disciplined and careful about it. And despite that effort, I remained consistently overweight.

When I shifted to a whole-food, plant-based diet, I lost about 30 pounds in under three months. My energy improved dramatically. My digestion normalized. My skin cleared. And I stopped thinking about protein entirely.

These days I eat potatoes, rice, beans, vegetables, and fruit until I’m satisfied — and the protein simply takes care of itself.

The Bottom Line

So where does all this protein anxiety come from?

Decades of messaging from the meat, dairy, and egg industries. Gym culture. A supplement industry that profits handsomely from our nutritional insecurity. When you look past the marketing and examine the actual physiology, something very simple emerges:

If you eat enough whole, unprocessed plant foods to meet your calorie needs, you will meet your protein needs. Period.

Consider: elephants, gorillas, and giraffes build their enormous, powerful bodies entirely on plants — and humans are considerably smaller. And horses and cows — the two animals we most associate with raw physical power, animals that pull, carry, and haul — are pure herbivores.

Nobody ever asks a horse where it gets its protein.

There’s nothing to fear.

Until next time — stay well, be fearless, and enjoy adding more good whole foods to your life.

Aharon Elkayam, M.S., is a practitioner trained in Traditional Chinese Medicine and functional medicine, with clinical internships in the U.S., Taipei, and Beijing. He has spent over a decade in clinical practice as an acupuncturist, herbalist, and functional medicine practitioner, with more than 10,000 patient visits, and now focuses on guiding people in improving their diet as a health coach. He can be reached at [email protected] or visit his website at aharonelkayam.com.