What Are Lectins? Debunking the Internet’s Favorite Anti-Nutrient background image
August 23, 2024

What Are Lectins? Debunking the Internet’s Favorite Anti-Nutrient

Headshot of Dr. Thomas Wnorowski

Dr. Thomas Wnorowski

PhD, CNCC, Clinical Nutrition Researcher & Biomedical Nutritionist
Headshot of Pooja Mahtani
Medical Review By:

Pooja Mahtani

PHARMD, MS, CNS, LDN, IFMCP, RN

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Key Takeaways:

Key Points:

  • Lectins are proteins found in beans, legumes, and grains. They’ve recently made waves in the wellness community for potentially negative side effects, but there’s not much science to support this claim.
  • The cooking process removes lectins from beans and legumes almost entirely. So, if you’re worried about lectin content in your food, just make sure it’s well-cooked.
  • Lectins are also being studied for their anti-tumor properties and may be a valuable asset to cancer treatment.

Whenever a whole category of foods is said to be “bad,” we have to ask questions.

The truth is, the science surrounding food hasn’t always been correct.

Just a few decades ago, margarine was considered a healthy food.

And processed cereals and fortified grains were the foundation of the food pyramid.

To claim that we know everything there is to know about good and bad food is a bold statement. The best we can do to support a healthy diet is listen to our intuition and consume whole and unprocessed foods that have been trusted by our ancestors for centuries.

… That brings us to lectins.

These are plant proteins found in beans and legumes. Recently, they’ve raised concerns in the wellness community due to some preliminary science. There are many health professionals who claim that lectins should be avoided at all costs.

But is this really true?

Let’s dive into this unique plant protein and uncover the truth about lectins.

Table of Contents:

Are Lectins Bad for You?

The answer to this question isn’t a simple yes or no. It’s more nuanced and has a lot to do with your genetics and how the legumes you’re eating are prepared.

Reasons to Avoid or Limit Lectins

Lectins aren’t necessarily bad for you. But if you have a sensitive gut or autoimmune disorder, you may want to limit them. Here’s why:

  • They Can Be Difficult for Your Body to Break Down. As with any protein, lectins take longer for your body to digest. They’re resistant to stomach acid and digestive enzymes. That said, lectins aren’t usually an issue unless you have a sensitive stomach or an autoimmune condition.
  • They Could Be an Anti-Nutrient. “Anti-nutrients” are natural compounds that can interfere with the absorption of vitamins and minerals in the body. The science on lectin as an anti-nutrient is spotty (most of the studies are done on animals). We don’t have enough human clinical studies yet to know how lectins may impact human health. 
  • People with Autoimmune Disease May Need to Avoid Lectins. There are select cases where lectins should be avoided. For some autoimmune patients, they can trigger symptoms. But in general, the lectins found in cooked beans or legumes shouldn’t impact the majority.
  • They Could Impact the Digestive Wall. Studies have shown that lectins found in kidney beans can poorly impact the digestive wall. This is technically true, but only when high levels of lectins are consumed. If kidney beans are cooked, they are much safer to eat.

There’s a lot of misinformation about lectins. The research is low-quality and was primarily done on animals. While it’s true that very high levels of lectins can have health consequences, we’re only exposed to those levels when we eat undercooked beans and grains.

The Good Side of Lectins

  • Lectins Have Antioxidant Properties. Yep, these highly controversial plant proteins can actually support your cells by scavenging free radicals.
  • They Could Slow Digestion and Lead to Improved Blood Sugar Regulation. Remember how we said lectins are difficult to break down? Because of this, they can slow the digestive process — keeping you full for longer and positively impacting blood sugar levels. In general, legumes and beans are considered a superfood for blood sugar regulation. Whether the lectins themselves are responsible for this quality is yet to be known.
  • They May Have Anti-Tumor Properties. There are many different types of lectins. Some lectins are being studied for their anti-tumor properties. They’re actually being tested as an alternative therapy to cancer.
  • Lectin Sensitivity May Be Something Else. It’s easy to blame lectins for gut dysbiosis. Beans and legumes in general are known to increase gas due to their high fiber content. But before you blame lectins, it’s important to look at the whole picture of your digestive health. Gluten, soy, and other common food triggers, as well as underlying gut infections, are a more likely cause of symptoms.
  • Lectins are More Dangerous to “Transformed” Cells. Research shows that lectins are more dangerous to the human body when cells are already mutated (aka, a person is diagnosed with cancer).

Here’s the takeaway: just because one element of an otherwise healthy whole food has questionable findings doesn’t mean that food should be eliminated entirely. If legumes are causing obvious gut symptoms, then it may be helpful to remove them from your diet and work on healing the gut before adding them back in later. Otherwise, foods containing lectins can have a positive impact on the body overall.

Easy Ways to Remove Lectins From Your Food

Another misconception about lectins is that they’re always present in legumes. This isn’t true. You’ll find high levels of lectins in raw legumes, but not in cooked ones. If you’re concerned about lectins in food, here are some things you can do to dramatically reduce them, depending on your sensitivity level…

You’re Concerned About Lectins

Cook Your Legumes. Lectins are water-soluble, so they start dissolving during the cooking process. When we isolate a lectin and look at the science, it makes sense that it could have concerning effects on the body. But in practice, cooked legumes have almost no remaining lectins.

You’re Moderately Sensitive to Lectins

Try Canned Legumes. Canned and organic legumes low in sodium may have a lower lectin content. This is because they’re pre-cooked and then soaked in liquid until they’re ready to use.

You’re Sensitive to Lectins

Soak Your Legumes. This is an ancient practice that’s only recently been lost to modern convenience. By soaking your beans and lentils before cooking (for several hours up to a whole day), you can dramatically lower the lectin content. That’s not where the benefits of soaking beans stop, though. Soaked beans tend to be easier to digest with more bioavailable nutrients. 

What Foods Have Lectins?

Remember, lectin content in foods isn’t usually a big deal. But if you are sensitive or just want to be aware of the lectins you’re consuming, here’s a guide on what foods have lectins:

  • Kidney beans
  • Chickpeas
  • Black beans
  • Soybeans
  • Lentils
  • Peas
  • Peanuts
  • Broccoli
  • Potatoes
  • Eggplant
  • Wheatgerm

There’s No Good Reason to Banish Legumes From Your Diet (Most of the Time)

Just because lectins look scary on paper doesn’t mean they actually are in real life. The truth is, humans have been eating lectins for thousands of years without any negative side effects. Lentils and beans are staple foods in many cultures, and for a good reason. They contain powerful nutrients for blood sugar regulation, gut microbiome support, and immune-boosting properties.

Recent studies and discourse against lectins are missing the whole picture. And, without clinical trials or long-term observational research in humans, there’s no good reason to remove lectins from your diet (unless you have an autoimmune disease or known sensitivity).

Need a little extra digestive support? Learn more about our gut-healing postbiotic, BodyBio Butyrate.

Related Articles

Semaglutide Can Change What People Want to Eat. Here's What Your Gut Has to Do With It.
Ashley Palmer | 10.27.2026

Semaglutide Can Change What People Want to Eat. Here's What Your Gut Has to Do With It.

Imagine you order the meal you've loved for a decade, and a few bites in, you realize you just don't care about it. You're not full, exactly. Just uninterested.

Many people taking semaglutide (a GLP-1 medication) describe this experience. Foods that were reliable favorites suddenly seem greasy, or too sweet, or just vaguely off. Scientific American captured the strangeness: a former food writer losing interest in cooking, longtime favorites tasting wrong.

The obvious explanation is that these medications make you feel full sooner. But fullness doesn't explain why a specific curry tastes bitter now, or why a go-to wine suddenly tastes off. Something more is happening, and it points to a hormone your body has been producing your whole life.

In this article, we'll look at what the newest research suggests semaglutide does to food preferences, what GLP-1 actually does inside the body, and where your gut microbiome and a short-chain fatty acid called butyrate fit into that system.

Table of Contents:

  • Semaglutide Isn't Only Changing How Much People Eat
  • Your Gut Was Making GLP-1 Long Before Ozempic
  • Where the Microbiome Comes In
  • Can Butyrate Support Natural GLP-1 Production?
  • Why Butyrate Matters Beyond One Hormone
  • Support the System, Not Just the Signal
  • The Bigger Story Your Gut Was Already Telling

Semaglutide Isn't Only Changing How Much People Eat

Researchers are starting to document what users have been describing anecdotally.

A 2026 observational study of hospitalized Japanese patients with type 2 diabetes found that those on semaglutide showed significantly reduced preference for sweet carbohydrates, non-sweet carbohydrates, and non-sweet fats — while preferences for protein and dietary fiber stayed essentially unchanged. This wasn't a blanket loss of interest in food. It was a selective shift.

For someone focused on weight loss, eating less may be the point. Still, a reduced appetite for fats is worth paying attention to, since dietary fats supply essential fatty acids and help the body absorb fat-soluble vitamins.

Taste perception may also contribute. In a 16-week, randomized, placebo-controlled study of 30 women with obesity and PCOS, semaglutide improved overall taste recognition scores and altered brain activity in response to both food images and a sweet solution. In other words, participants' sense of taste sharpened, which may help explain why some foods suddenly seem too strong.

A 2025 study found the opposite: reduced sensitivity across all five basic tastes in people taking GLP-1 medications compared with matched non-users. That means the more accurate takeaway isn't "Ozempic makes food taste different" so much as "GLP-1 signaling reaches further into how we experience food than many researchers expected."

None of these studies settles the question on its own. But together they point somewhere useful: GLP-1 isn't only a satiety signal. It appears to play a role in how appealing food seems in the first place.

Your Gut Was Making GLP-1 Long Before Ozempic

Here's what often gets lost: GLP-1 wasn't invented by a pharmaceutical company.

GLP-1 is a hormone your intestines release on their own, produced mainly by specialized cells called enteroendocrine L-cells. These cells sit in the gut lining, acting as sensors that detect what's arriving from your meal and releasing hormones that coordinate the response.

GLP-1 helps regulate insulin release, slows how quickly the stomach empties, contributes to satiety, and carries information from the gut to the brain. GLP-1 medications didn't create a new pathway. They target one your body was already running.

But there's an important difference, and a lot of wellness marketing glosses over it. Your body's own GLP-1 is broken down within minutes of release. Semaglutide is engineered to resist that breakdown and activate GLP-1 receptors far more strongly, for far longer.

Supporting your body's own GLP-1 signaling through food or the microbiome isn't a lesser version of taking semaglutide. It's a different thing entirely.

Where the Microbiome Comes In

Your gut bacteria eat what you don't digest.

When fermentable fibers and resistant starch reach the colon, bacteria ferment them and produce short-chain fatty acids (SCFAs), mainly acetate, propionate, and butyrate. These aren't waste products. They're signaling molecules, and the cells lining your intestines are built to receive them.

Intestinal cells carry receptors, including FFAR2 (also called GPR43) and FFAR3, that detect short-chain fatty acids. When SCFAs bind these receptors on L-cells, they trigger an internal cascade that can influence the release of gut hormones, including GLP-1 and a related satiety hormone called PYY.

So the pathway is real: fiber arrives, microbes ferment it, metabolites are produced, gut cells sense them, hormones get released, and the gut communicates with the pancreas and the brain. That last link is worth sitting with — your gut and brain are in constant conversation, and food-derived microbial metabolites are part of what they're saying to each other.

The quick version of this compresses to: fiber → butyrate → GLP-1 → less hunger. The actual biology is an ecosystem with many signals, of which butyrate is one.

Can Butyrate Support Natural GLP-1 Production?

The mechanistic evidence is strong. The human evidence is thinner, but still developing.

A small 2026 study in adults with obesity found that oral sodium butyrate combined with L-arginine significantly increased circulating GLP-1. That's encouraging, but the study had only seven participants, butyrate wasn't tested on its own, and participants reported no difference in hunger or fullness.

By contrast, in a 2025 randomized controlled trial of 50 adults with obesity, people taking sodium butyrate alongside a reduced-calorie diet saw reductions in weight, BMI, and waist circumference, but their serum GLP-1 didn't change significantly.

A 2026 randomized, double-blind trial of 46 adults added more nuance. After 12 weeks of sodium butyrate plus a moderately reduced-calorie diet, participants with obesity lost a meaningful amount of weight. Participants who also had type 2 diabetes did not, although their blood sugar control improved.

That pattern echoes an earlier finding. In a 2018 study, four weeks of oral butyrate improved insulin sensitivity in lean men but not in men with metabolic syndrome.

Together, these suggest butyrate's effects depend heavily on metabolic context: who you are, what your microbiome looks like, and where the butyrate ends up. But GLP-1 is only part of the story.

Why Butyrate Matters Beyond One Hormone

Focusing only on GLP-1 undersells what butyrate does.

Butyrate is the primary fuel source for colonocytes, the cells lining your colon. Not a supporting nutrient. Their main energy supply. Those cells use butyrate to power the work of maintaining a functioning gut lining, the barrier that decides what passes from your digestive tract into your body and what doesn't.

This is where the cellular health picture comes together. A well-fueled intestinal lining supports a healthy gut barrier. A healthy barrier supports a stable environment for the microbial community living there. And that community produces metabolites that signal to the rest of the body — including the gut-to-brain communication involved in appetite and satiety.

Butyrate sits at the center of that loop as both fuel and message. That role holds regardless of what the GLP-1 research eventually concludes.

Support the System, Not Just the Signal

The takeaway isn't that you should be trying to maximize GLP-1. Your metabolism and gut function are more complex than one signal.

Lasting metabolic regulation runs on an ecosystem: microbial diversity, adequate fermentable fiber, well-nourished intestinal cells, an intact gut barrier, and steady communication between gut and brain. Semaglutide shows what happens when you push one signal in that system very hard. It doesn't show that one signal is the whole system, or the only way to modulate it.

Feeding that ecosystem starts with fiber-rich whole foods: vegetables, legumes, cooked-and-cooled potatoes and rice (good sources of resistant starch), and other plant foods your gut bacteria can thrive on. Give it time. Gut environments shift over weeks and months, not days.

For targeted support, BodyBio Butyrate provides butyrate in supplement form to support the gut lining and a healthy microbiome.*

The Bigger Story Your Gut Was Already Telling

Semaglutide has taught researchers a great deal about how strongly GLP-1 signaling can influence not just hunger but desires: what sounds good, what tastes right, and what gets left on the plate.

And yet, the more interesting revelation may be how much was already happening without it. Every meal you eat feeds a microbial community that turns fiber into signaling molecules, which intestinal cells read and translate into messages sent onward to your pancreas and your brain. That conversation has been running your entire life.

Butyrate is one voice in that conversation. It fuels the cells that hold your gut barrier together and takes part in the signaling between your microbiome and the rest of your body. Supporting butyrate production in the gut won't replicate a pharmaceutical. It doesn't need to. Feeding the system well is its own goal, and the benefits build gradually, often in small shifts that are easy to miss at first.

Support your gut at the cellular level with BodyBio Butyrate.*

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

This article is for educational purposes only and is not a substitute for medical advice. If you're taking semaglutide or another GLP-1 medication, talk with your healthcare provider before adding new supplements.

Comprehensive Guide to Butyrate: What it is, Benefits, Side Effects, & More
Ashley Palmer | 06.16.2026

Comprehensive Guide to Butyrate: What it is, Benefits, Side Effects, & More

Butyrate is a necessary component to a balanced microbiome, also working as an inflammation guard*. One of several, short-chain fatty acids created from fermented resistant starches, low butyrate levels have been associated with serious health concerns.

Butyrate and IBS: What Your Gut Cells Actually Need
Ashley Palmer | 04.24.2026

Butyrate and IBS: What Your Gut Cells Actually Need

You've tried the probiotics. You've cleaned up your diet. You're doing everything you're supposed to do, and your gut still isn't cooperating.

If you have IBS, that frustration is familiar. Bloating, urgency, unpredictable mornings, the constant guessing game of what's going to set things off.

What often gets missed in the conversation around IBS isn't a trendy new supplement or a stricter elimination diet. It's something more foundational: what your gut's own cells actually need to function.

Here's a closer look at what butyrate does, why IBS and low butyrate levels are closely linked, and how supporting the gut at the cellular level can make a difference.

Table of Contents:

  • Understanding Butyrate

  • How Butyrate Works in the Gut

  • Why This Becomes an Issue for People With IBS

  • Supporting the Body More Effectively

  • Butyrate, IBS, and the Cellular Health Connection

  • How Butyrate Supports IBS Comfort Long-Term

Understanding Butyrate

Butyrate is a short-chain fatty acid (SCFA) produced in the colon when beneficial gut bacteria ferment dietary fiber, specifically resistant starch. It belongs to a class of compounds called postbiotics, the functional byproducts of a healthy microbiome.

Unlike probiotics, which are living bacteria, butyrate is a metabolite. It's a compound your body puts to work directly at the cellular level. Understanding the difference between probiotics and postbiotics, like butyrate, is a useful shift you can make when thinking about gut health.

Why the Body Relies on Butyrate

Your colon is lined with specialized cells called colonocytes. These cells run almost entirely on butyrate, providing up to 90% of their energy needs.

When colonocytes have what they need, they do their job well. They maintain the integrity of the gut lining, regulate what passes into the bloodstream, support a healthy inflammatory response, and help keep gut motility on track. Without enough butyrate, the gut’s main source of energy, the gut simply can't do its job well.

How Butyrate Works in the Gut

Butyrate supports three interconnected systems in the gut: the gut lining, the immune environment, and gut motility.

The gut lining is just one cell layer thick. Butyrate fuels those cells and supports the tight junctions between them, the structural connections that keep the barrier intact and functioning.

At the immune level, butyrate helps the body maintain a balanced inflammatory response in the colon without triggering overactivation. And because it directly influences the rhythmic contractions that move contents through the digestive tract, it plays a meaningful role in the irregular patterns that so many people with IBS experience.

What Happens When Butyrate Levels Are Supported vs. Strained

When butyrate is available in adequate amounts, the gut lining stays resilient, motility is more regular, and digestive comfort improves, whether you have a diagnosis of IBS or not.

If butyrate levels fall short, the gut barrier may become less stable, motility can become unpredictable, and the colon's immune environment may shift. How pronounced these patterns are varies from person to person. Diet, stress, genetics, and microbiome composition all play a role in your body’s patterns too.

Why This Becomes an Issue for People With IBS

Modern Stressors on Butyrate Production

Butyrate is made by gut bacteria that ferment resistant starch, a type of fiber found in foods like cooked and cooled potatoes, legumes, and underripe bananas. The modern diet is low in these foods. That means many people simply aren't giving their gut bacteria the raw materials they need to produce adequate butyrate levels.

Antibiotic use, chronic stress, and certain medications can also reduce the population of butyrate-producing bacteria in the colon. Over time, that compounds the butyrate production gap.

Why Common Approaches Often Fall Short

Probiotics can be a valuable part of gut health support, but most probiotic strains are not butyrate-producing species. They can shift the microbiome, but they don't directly address the fuel shortage that many IBS-related symptoms may stem from.

Fiber-based approaches come with a similar challenge. In some people with IBS, increasing fermentable fiber can worsen bloating and gas before it helps, because a disrupted microbiome may not efficiently use that fiber to make butyrate.

Since butyrate works at the cellular level, the signs of low butyrate can overlap common IBS symptoms, which is part of why the connection between the two gets overlooked.

Supporting the Body More Effectively

Foundational Support for Butyrate Production

Diet is the first step to improving the body's natural butyrate production. Foods high in resistant starch give butyrate-producing bacteria what they need to function properly.

Foods that naturally support butyrate production include cooked and cooled rice, potatoes, and legumes. A steady intake of resistant starch over time does more for the microbiome than occasional high-fiber days followed by low-fiber ones.

Stress management and adequate sleep can also support a more stable gut environment. Chronic stress directly affects microbiome composition and motility through the gut-brain axis. 

When Targeted Butyrate Support Makes Sense

For people whose microbiome is disrupted or whose diet can't consistently provide enough resistant starch, direct butyrate supplementation is another option for long-term support.*

Supplemental butyrate delivers the short-chain fatty acid directly to the colon, where colonocytes can put it to use.* Clinical research has shown that sodium butyrate supplementation is associated with improvements in abdominal comfort and bowel regularity in people with IBS.

Sodium butyrate and calcium magnesium butyrate are both effective options, and the differences between which works best for your body often come down to your individual health history and mineral needs.*

Butyrate, IBS, and the Cellular Health Connection

IBS is complex, and its causes vary from person to person. But one consistent finding in the research is that people with IBS tend to have lower levels of butyrate-producing bacteria and overall reduced short-chain fatty acids in the gut. That points to a cellular resource problem as much as a microbiome problem.

When the cells lining the colon are undersupported, the entire digestive environment becomes less stable. Gut barrier function, motility, immune signaling, and communication along the gut-brain axis all depend on colonocytes having what they need to function.

Supporting the gut at the cellular level is not a replacement for other gut health practices (whole food probiotics, exercise, etc.). It’s the foundation that makes those practices more effective. When your cells are supported, the body functions more efficiently as a whole.

How Butyrate Supports IBS Comfort Long-Term

IBS can feel like a moving target, and the path toward better digestive comfort is rarely a straight line or a quick fix. Supporting your gut at the cellular level creates a more stable foundation, and that starts with making sure colonocytes have the fuel they need.*

Butyrate works best as part of a consistent approach that includes diet, lifestyle, and targeted support where needed. Progress tends to be gradual, and that's expected. It reflects the time it takes for the gut lining to strengthen and the microbiome to rebalance.

IBS makes a lot more sense when you know what the gut's cells actually need. And that clarity is often where real progress begins.

Support your gut at the cellular level with BodyBio Butyrate.*