Food With Lectins In Them


Lectins are a type of protein that can be found in our favorite foods. Food With Lectins In Them They can have negative side-effects on your body if they are not digested properly. Many lectins are found in foods like soybeans, spinach, kidney beans and peanuts, where they act as natural pesticides to protect them from being eaten by insects.

What Foods Are Lectins Found In?

By Laurie Fanelli in Healthy Feeling

Every year it seems a new food villain is declared as the culinary culprit behind weight gain, stomach aches, or inflammation. Lectins are the latest ingredient to be targeted for elimination by fad diets and food headlines, but do they deserve all the negative press?

What foods are lectins found in? What are the negative and positive effects of lectins? Here are answers to all your questions about lectins and their place in our diets.

What Are Lectins?

According to the Harvard T.H. Chan School of Public Health, lectins are proteins that bind to carbohydrates, and they’re found in all plants. Raw legumes and whole grains contain the highest amounts of lectins.

So, what foods are lectins found in? Here’s a list of the most common sources of lectins:

  • Beans
  • Lentils
  • Peanuts
  • Peas
  • Soybeans
  • Wheat

An article in Frontiers in Plant Science explains that in nature, lectins help to protect plants from pathogens and herbivorous insects. Lectins are a key component of a plant’s immune system and act as a defense against bacteria, viruses, and fungi.

Cooked beans

Potential Side Effects of Eating Lectins

Lectins resist being broken down, thus they may cause problems during digestion, explains the Harvard T.H. Chan School of Public Health. Eating raw or undercooked beans can produce side effects such as nausea, vomiting, and diarrhea as well as milder issues like bloating or gas.

Some studies have shown that lectins can also interfere with the absorption of calcium, iron, zinc, and other minerals.

To Eat or Not to Eat Lectins?

As much hype as there has been about the negative side effects associated with eating lectins, humans don’t consume them in large amounts all that often. Lectins are most potent when eaten raw, and ingredients high in lectins like beans or legumes are consumed after the dried versions are soaked and boiled. This disables most of the lectins’ active properties, explains the Harvard T.H. Chan School of Public Health.

In actuality, foods containing lectins are often considered a healthy part of a balanced diet. Legumes, beans, and nuts are rich in fiber, healthy fats, and minerals.

Lectins may be difficult from some to digest, but with proper preparation, many of the negative side effects can be avoided in great dishes like lentil soup and vegetarian chili.

Now that you know what foods lectins are found in and what effects they have on the body, you can decide whether or not to include them in your diet. As with any dietary change, it’s a good idea to consult with your doctor before starting a new program.

Various types of beans

What do you think about lectins? Do you love ’em or leave ’em? Check out the Smart Snacking board from @tomsofmaine on Pinterest for some additional healthy food ideas!

Food With Lectins In Them

These six foods are some of the worst sources of lectins in the American diet when consumed raw.

1. Raw Kidney Beans

Red kidney beans are a great source of plant-based protein and they are a low-glycemic-index food. However, it’s critical that you boil them thoroughly before you eat them. Eating raw or undercooked kidney beans exposes you to an incredibly high level of phytohemagglutinin. Cooking beans thoroughly reduces the activity of this lectin to undetectable levels.

2. Peanuts

Peanuts are another form of legume, and like kidney beans, they contain lectins. Peanut lectins can be detected in the blood after eating peanuts in large amounts. While no studies have been done to determine whether this has health effects, it does show that peanut lectins are absorbed by the body.

3. Whole Grains

Raw wheat and other whole grains are high in lectins. Raw wheat germ, which is often sold as a source of fiber, can contain as much as 300 mcg of wheat lectins per gram. If you’re trying to avoid lectins, do not eat raw whole grains.

4. Raw Soybeans

Soybeans are another legume that’s full of lectins. However, unlike some other legumes, soybeans are often eaten toasted or roasted. This type of dry heat does not appear to be as effective at breaking down lectins as boiling. Be cautious when eating raw or toasted soybeans if you are avoiding lectins.

5. Raw Potatoes

Potatoes are part of the nightshade family and contain high levels of lectins. Raw potatoes, in particular the skin, appear to contain potentially harmful lectins that may affect your health.

More studies need to be done to see whether these lectins are the cause of health problems after eating raw potatoes in humans.

Lectin-Free Alternatives

All of the above foods have associated health benefits as well as lectins. In most cases, cooking these foods with “wet” heat, such as stewing, boiling, cooking in sauce, or mixing into dough and baking, breaks down lectins to negligible levels. Simply avoid eating raw legumes, grains, or potatoes, and eat these foods cooked instead.

Why You Should Avoid Lectins

Lectins are sometimes dangerous because of how they bind to carbohydrates like sugar. You should avoid certain types of lectins due to a risk of:


Certain types of lectins can prevent your body from absorbing other substances that have nutritional value. This can eventually lead to serious problems such as malnutrition.


Some sources of lectins are considered seriously poisonous. Castor beans, for example, contain a potent lectin poison called ricin.

Damage to the Digestive System

Certain types of lectin may bind with the walls of your digestive system which can lead to serious problems. Eating one particular lectin, phytohemagglutinin, can lead to severe abdominal pain, vomiting, and diarrhea.

Potential Risk of Auto-immune Response

Some proponents of lectin-free diets claim that lectins can cause symptoms of auto-immune disorders. However, studies are still being done to confirm or deny this idea. Currently, there is no scientific consensus backing up the idea that lectins are connected to any health conditions outside of acute lectin poisoning.

Eat This: Paleo, Pegan or Lectin Free

Headline-inducing, outta-a-book type diets are attractive because they tell you what to eat and what not to eat with big promises of helping you feel better, look better, end your pain, help you lose weight, dodge the disease bullet and live a long and healthy life. The list of top 10 diets can change from year to year, with a new one hitting media headlines depending on which celeb has followed it with life changing results that pulls you in, thinking that it’s the answer to your problems. It’s that monkey see, monkey do mentality that if it worked for him or her, it could work for me. But what you don’t know from that headline is the why. How did they feel as they began? Who monitored them?

With all the diets out there, is there one that could actually help you with your ongoing issue? Could there be food groups that cause that constant belly pain, the daily headaches, put you at high risk of diabetes, progress your autoimmune disease or MS faster than you want or contribute to your ever increasing blood pressure or cholesterol? You’ve heard me say how important antioxidants are in your diet, but if you’re winging it, are you really giving it your all and enough of a chance to work?

I’ve worked one on one with clients for over 20 years. I have seen fascinating results as clients shared their journey following a specific diet. Some had massive success and some met with disaster. But how do you decide what to put your attention on and actually try with gusto? I believe that has to start with the “what’s in it for me?” Is it really worth making the change and feelings of deprivation that we often have as we start something new? I feel a series coming on with this because there are SO many diets out there, and when a loyal listener asked about the Lectin Free diet, it sparked me to do some deep diving into a bunch of them. So today on EAT THIS with Lianne, which diet would be best for me (as in you)? And an introduction to Paleo, Pegan and Lectin Free.

There are people who don’t like to be told what to do, and those who prefer to be guided, coached and even ordered what to eat. It somehow takes the pressure off when you’re told what to eat. I aim to guide my clients to a place where they know what works for them and what doesn’t, without the hard right from where they are at to some mass deprivation and depression because they can’t eat their favorite foods any longer. There is a place for specific diets though, because depending on where you’re at, what you’re suffering with, there is an impact that you can have by changing  your diet. Knowing which one is key. 

Today I’m going to outline three diets: Paleo, Pegan and Lectin Free. Each could be a whole episode on its own, but let’s start with what each is all about, what it’s best for, what you can or can’t eat, and what a day in the life of would look like. I’ll add in my 10 cents worth obviously, and what I’ve seen work for clients so you have more than what you can Google about each diet. 


First up, Paleo. Loren Cordain released his book, The Paleo Diet in 2002, and that was the rebirth of this diet as it is based on what might have been eaten during the Paleolithic era, from between 2.5 million to 10,000 years ago. Also called the Stone Age diet, hunter-gatherer diet and caveman diet.

What can be helped? Loren says “Improved health in almost every regard”, but more specifically, “improved energy levels throughout the day, improved blood lipids can occur with days to a week. Improved sleep, particularly when salt and alcohol are reduced. Over the long haul, weight is normalized, acne improves, blood pressure lowers and reduces the risk for metabolic syndrome. Generally, many illness and disease symptoms are ameliorated or improved”. [Metabolic syndrome is a cluster of conditions that occur together, increasing your risk of heart disease, stroke and type 2 diabetes. These conditions include increased blood pressure, high blood sugar, excess body fat around the waist, and abnormal cholesterol or triglyceride levels.]

In a nutshell, eating paleo means consuming whole foods from plants and animals and avoiding processed foods (think: anything that comes out of a wrapper).

What you can eat:

  • Vegetables and fruits
  • Nuts and seeds
  • Natural herbs and spices
  • Fresh lean meat and poultry, preferably grass-fed
  • Fresh eggs
  • Fresh fish and seafood, preferably wild-caught
  • Healthy fats, including flaxseed, avocado, olive oil and coconut oil
  • Unsweetened tea and coffee
  • Water

What to avoid: 

  • Legumes (including beans, peas, peanuts, soy)
  • Dairy
  • Cereal grains (including rice, wheat, quinoa, cereals)
  • Refined sugars
  • Refined oils, including vegetable oils
  • Trans fats
  • Artificial sweeteners
  • Processed foods
  • Alcohol

Breakfast might look like scrambled eggs cooked in olive oil and sprinkled with torn spinach and chopped parsley, any fresh fruit and some herb tea. Lunch could look like romaine lettuce salad with chicken and homemade dressing of lemon juice and olive oil, baked sweet potato sprinkled with herbs or cinnamon and some raspberries to end off. Dinner could be a grilled grass-fed steak, a bunch of vegetables sautéed in avocado oil, fresh greens and sprouts topped with sunflower and pumpkin seeds and oil and vinegar dressing. Snacks of fruit and nuts, like walnuts. So what you can’t have is hummus and dips like tzatziki because of the dairy. Coconut alternatives to dairy are helpful in baking and something like a frittata, which is super fast and can be piled high with veggies and even fish. 

This is my general recommendation for peri-menopausal women and have even followed it myself after I put on a bunch of weight because I listened to a trainer at a gym that I was working out at who told me to eat my weight in grams of protein. My body blew up and I felt awful. I mostly followed the Paleo diet and did intermittent fasting (don’t worry, I will do an episode about IF soon too). It was finally what shifted that weight and sorted out my gut. There is also a study to back up that this could be more appropriate for women around menopause to shift very stuck weight. Studies also show that it can shift abdominal fat, which is the most dangerous, and improve triglyceride levels. All good! 


Created by Dr Mark Hyman, the pegan diet combines key principles from paleo and vegan diets. This mashup of the vegan and paleo diets dates back to 2014, when this functional medicine doctor posted it on his blog. He noticed that elite athletes like Lebron James follow a paleo diet, while vegan Rich Roll completed five Iron Man competitions. So he decided to combine the two, forming the paleo-vegan diet plan.

I remember talking about this on the radio with host, Jerry Agar, wondering what on earth was left to eat in combining these two diets. Looking into it more, the diet focuses on less sugar and refined grains, more plants (like 75% of your plate) and minimal animal protein. For animal protein, think much less than Paleo, but more than vegan. And of that animal protein, Dr Hyman insists on grass-fed, pasture-raised sources of beef, pork, poultry and eggs. Also, low mercury fish like sardines and wild salmon are good, but “no chemicals additives, preservatives, dyes, MSG and artificial sweeteners.” 

What you can eat:

  • Fruits and veggies: Focus on deeper colors and “the more variety the better”
  • Fish: If you consume fish, it should be low in toxins and mercury
  • Meat and poultry: Eat sustainably raised or grass-fed
  • Healthy fats: Nuts, seeds, olive oil and avocados
  • Eggs: Eat the entire thing, yolk and all

If you’re following a vegan version, do take Methyl B12 Spray, and also Sunshine D3+K2 as you don’t have it come from food.

What to limit or avoid:

  • Dairy: Dr. Hyman believes that dairy leads to obesity and other chronic diseases
  • Gluten: None
  • Grains: Gluten-free grains may be eaten only in limited amounts. The goal is to eat low-glycemic whole grains.
  • Beans: Can be eaten in limited amounts. Dr. Hyman believes that beans increase blood sugar and that lectins (a protein found in beans) cause inflammation and decrease nutrient absorption.
  • Vegetable oils: None. 

I don’t know anyone who has followed this, but I do follow Dr Hyman’s work and he is quite focused on blood sugar balance, as well as detoxification of heavy metals after he himself had issues. I don’t see myself recommending this fully as it’s quite restrictive long term but could even out issues that someone has been suffering with, including obesity.


Lastly, the Lectin Free diet by world renowned Dr Steven Gundry. I do think I’ll do a whole episode on this because it warrants more than we have time for today. Dr Gundry put out his book, Plant Paradox, in 2017, and he believes that all disease begins in the gut and he highlights that plants have their own defence mechanism to protect them from bugs, animals and yes, us. They are trying to survive after all! Lectins are proteins that humans can’t digest and they grab onto the outside of your cells interrupting absorption of vitamins and minerals, leading to leaky gut, food sensitivities and leaving you feeling lousy with brain fog, acne, all the way through to cardiovascular disease and being overweight. Many ‘healthy’ foods contain lectins so it’s a bit of a shocker to know that your chia seeds are wiped off this list, your tomatoes, cucumbers, and colourful peppers are off this list.

What you can eat:

  • pasture-raised meats, but grass fed and grass finished are key here
  • A2 milk
  • cooked sweet potatoes
  • leafy, green vegetables
  • cruciferous vegetables, such as broccoli, cabbage and Brussels sprouts
  • asparagus
  • Garlic, and onion
  • celery
  • mushrooms
  • avocado
  • olives or extra virgin olive oil

What to avoid:

  • squash
  • legumes, including beans, peas, lentils, and peanuts
  • nightshade vegetables, such as eggplant, peppers, potatoes, and tomatoes
  • fruit, although the diet allows moderate amounts of in-season fruit
  • grains

Absolute NOs: 

  • corn
  • meat from corn-fed animals
  • A1 milk

You can pressure cook a lot of foods to get rid of the lectins as well as remove seeds and skin from tomatoes, cucumbers and peppers. That’s where they are. 

Avoiding the lectin foods can really turn things around for people quite quickly. Not to mention weight loss. Dr Gundry suggests eliminating fruits that aren’t in season as it’s full of sugar, and recommends avocado, green bananas and plantains. I don’t know about you but green banana make my teeth go funny, so I’m not sure I’ll go there, but it’s an interesting concept. 

I have known people to eliminate certain nuts from their diet and belly pain goes away. And someone that I’ve been helping recently has ongoing pain in her abdomen, with what I call a ‘never-well-since’ after she had her gallbladder removed, so I suggested looking into this diet and see if it helps. Within two days, she is feeling better and having more awareness of what she is eating has really started her to feel more empowered as opposed to crappy without knowing why. Lectins are most potent in their raw state. Therefore, cooking lectin-rich foods at high temperatures can dramatically reduce their content.


Ok a quick refresh – a paleo diet mostly excludes farmed foods like dairy, grains, and beans. Pegan is 75% plants and the rest animal protein from grass fed and pasteurized animals and Lectin Free is more specific, avoiding those lectin rich foods. 

Notice any similarities in all these diets? They don’t have processed foods and they eliminate sugar and grains. Overall, if I’m going to suggest a particular diet to anyone, it’s going to be a version of any of these three. The Pegan diet or a version of it is likely what I direct most people towards, but ditching all grains and all dairy can be a tough one. It’s the ever difficult see-saw of feeling like you’re living by eating what you love, and not suffering with pain or worry on a daily basis. If you need structure, then maybe one of these diets are for you.

Don’t go it totally alone though. Reach out for help, either from me or someone like me, and really do your research so you don’t end up worse off with deficiencies. Following most diets for about a month, while painful, is almost doable to see if it’s a fit, but flip flopping is not the best way forward.

If you know someone who this might help, please share and rate the podcast so others know to spend their precious time listening in. No matter what you choose, remember to eat this, one mouthful at a time.

Know your Food options for Inflammation prevention & Gut healing!
Know your Food options for Inflammation prevention & Gut healing!

Dr. Steven Gundry popularised the lectin-free diet. He is a former heart surgeon who switched his focus to food and supplement-based medicine.

Dr. Gundry describes lectins as the main danger found in our modern diet. In response, he has written a book that provides information on how to avoid lectins, alternative food choices, and recipes.

When we remove the inflammatory agents such as lectins from our food,  our body gets free from stressing over digesting these difficult to digest foods, this leads to reduced inflammatory response in our body!

Dr. Steven Gundry popularised the lectin-free diet. He is a former heart surgeon who switched his focus to food and supplement-based medicine.

Dr. Gundry describes lectins as the main danger found in our modern diet. In response, he has written a book that provides information on how to avoid lectins, alternative food choices, and recipes.

When we remove the inflammatory agents such as lectins from our food,  our body gets free from stressing over digesting these difficult to digest foods, this leads to reduced inflammatory response in our body!

It can impact on:

  • Shedding  excess weight
  • Healing inflammatory diseases.

These are the foods that no human ate until about 10,000 years ago—and today we eat and we are ill-equipped to digest them.

What are lectins:

Lectins are a type of protein that, in humans, may help cells interact with one another.Lectins may impact health in multiple ways, ranging from digestion to chronic disease risk.

Lectin rich foods and how to reduce their Lectin content!

A lectin-free diet may be difficult for vegetarians or vegans to follow, since legumes, nuts, seeds, and whole grains provide plant-based protein.

Peanuts & Cashews:

Popular belief says these are nuts! but they are not , these are legumes and loaded with lectins which is highly inflammatory and can trigger Rheumatoid arthritis and other autoimmune inflammatory disease symptoms!


Quinoa is a pseudo-grain often used as a gluten-free substitute to wheat, but it is loaded with lectins that is unfriendly  to the digestive tract, immune system, or weight.

If you must have quinoa its best to first soak it and then ferment it before cooking in an effort to reduce its potential toxic effects of lactins.

Brinjal, Potatoes, Bell peppers, Goji berry and Tomatoes:

All these from family of nightshades have very high lectin content and therefore not healthy for your gut and joints.


Corn too has a very high lectin content, apart from it being genetically modified , both these make it highly inflammatory. corn is most common food additives used as corn syrup, cornstarch, cornflakes and other breakfast cereals, corn chips!

Legumes and beans

Beans, peas, soybeans, lentils, and other legumes (also known as pulses) have the highest lectin content of any food group.

that’s why they are also known for their ability to cause gas, bloating, and indigestion, however soaking them overnight and pressure cooking them well will reduce their lectin content substantially.

therefore for all vegetarians eating these must practice overnight soaking and cooking them well before consuming to avoid these ill effects.


Dairy products made from the milk and even those that are grass-fed contain the lectin-like protein casein.

Ways to decrease lectins in foods include:

  • Peeling and deseeding  fruits and vegetables, as the skin or hull and seeds tend to contain the highest amounts.
  • Sprouting seeds, grains and beans will deactivate lectins.
  • Fermenting will also effectively reduce harmful lectins. All vegetables can be fermented, thereby boosting their health benefits.
  • Using a pressure cooker and boiling at high flamePlant lectins are most effectively neutralised when cooked in a pressure cooker, so this handy kitchen gadget may be a worthwhile investment. Avoid slow cookers, as they will actually increase lectin content due to the low temperature used.

Foods to eat:

Those on lectin free diet can eat following foods:

  • pasture-raised meats
  • A2 milk
  • cooked sweet potatoes
  • leafy, green vegetables
  • cruciferous vegetables, such as broccoli and Brussels sprouts
  • asparagus
  • garlic and onion
  • celery
  • mushrooms
  • avocado
  • olives or extra virgin olive oil

To sum is up, lectins have the potential to increase inflammation and make your autoimmune condition worse , however complete avoidance is neither possible nor ideal ! key is to identify the worst culprits, remove them, and ensure that food  prepared and cooked properly to make them safer to eat.

Leave a Reply

Your email address will not be published.

TheSuperHealthyFood © Copyright 2022. All rights reserved.