Lectin Shield Reviews 2024: Gundry MD Is Legit Or A Quack Product?


Reviewed by Kathy Shattler, MS, RDN
lectin shield reviews

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lectin shield reviews








  • Supports intestinal health
  • Promotes digestive strength
  • Comes with 120 capsules that last a month
  • Rated 4.77 on Gundry MD’s official website
  • Satisfied user reviews
  • Helps with bloating
  • Reduces gas formation
  • Reduces cravings for lectin foods

Brand Information

  • Founded by Dr. Steven Gundy
  •  Recognized for wellness products
  •  Various dietary and skincare products/supplements
  •  Great customer reviews

Medical Benefits

  • Promotes intestinal health
  • Reduces gas formation
  • Controls craving for lectin foods

About The Brand

Gundry MD is a wellness brand founded by Dr. Steven Gundry, MD, who was one of the leading heart surgeons in the United States of America before starting this company. After shifting his career to wellness medicines, he became one of the best-selling authors in the New York Times through his book “The Plant Paradox”.

Gundry MD Lectin Shield was formulated based on Dr. Gundry’s theory of leaking gut. His belief in harmful lectins, present in our everyday foods and their adverse effects on our bodies, is what led him to create Lectin Shield – a formula that’s loaded with natural ingredients. Most of these ingredients can block or bind lectins to prevent them from entering our digestive tract, ultimately helping us achieve a healthy intestinal system.

What Is Gundry MD Lectin Shield?

Gundry MD’s main objective is to improve human health, happiness, and longevity through supplements that claim to improve digestive concerns, boost energy, increase mental clarity, and accelerate weight loss. 

Lectin Shield is the first-ever lectin blocker supplement, created by Dr. Steven Gundry, MD who claims that the product promotes digestive strength by resolving the harmful effects of proteins called lectins. The foods highest in lectins include nightshade vegetables, such as tomatoes, potatoes, goji berries, peppers, and eggplant. Legumes such as lentils, beans, peanuts, peanut-based products like peanut butter and peanut oil, and chickpeas consist of high amounts of lectins too, making them difficult to digest.

The product is made from a blend of 9 natural ingredients – one of the significant reasons why it has become wildly popular among followers of the lectin-free diet.  

Dr. Steven Gundry recommends taking Lectin Shield twice a day with two capsules in each meal intake so that it may build up in your body and fight against lectins, prevent lectin overload, and neutralize cellular damage – in turn leading to a strengthened digestive system. 

Feature Product & Coupon

lectin shield reviews

Gundry MD Lectin Shield

  • Improved digestive system
  • Reduced bloating
  • Supports gut lining
  • Allergic reaction
  • Diarrhea
  • Loss of appetite

Does Lectin Shield Really Work?

Dr. Steven Gundry, MD, claims that Lectin Shield is an effective lectin blocker supplement and both science and logic agree with his claims. The reason is that all of the nine ingredients that Lectin Shield is composed of have natural lectin-blocking or binding capabilities that aid various health concerns such as indigestion, bloating, trapping of gas, and joint pains.

Natural foods like cranberries, okra, crustaceans, kiwi, and blacker weed seaweed are assumed to be the most powerful lectin blockers – some of which are a part of Lectin Shield’s ingredients too. 

However, Dr. Gundry acknowledges that results may vary and hence provides an impressive 90-day money-back guarantee.

Is It Safe Or A Quack?

Many a time, certain medications and supplements work for some and not others; such is the case with Gundry MD Lectin Shield supplements. The best way to know for sure is to try the product and what better time than when it’s available at a discounted price? 

To reiterate, Lectin Shield, though generally safe, should still be taken after careful consideration and consultation with your doctor, especially in cases where the consumer is below 18 years of age, allergic to shellfish, pregnant, nursing, or has other existing medical conditions. 

Gundry MD Lectin Shield Ingredients

lectin shield reviews
Gundry MD Lectin Shield Ingredients List

Lectin Shield’s growing popularity is because the ingredients used are 100% natural, and almost all of them agree with every body type. Apart from a few allergic reactions to N Acetyl D-Glucosamine (NAG), Lectin Shield is reported as one of the most effective lectin blocker supplements available on the market.

It is also important to note that Lectin Shield is the original lectin blocker supplement and anything that follows is a copy of it. So, it’s a no-brainer that if ever we’re in search of digestive supplements, Gundry MD Lectin Shield is the one we’ll be picking.

300mg N Acetyl D-Glucosamine (NAG)

NAG is an amino derivative that’s extracted from the shells of crabs and other shellfish. It has been scientifically proven to reduce unsafe lectins and bind them to wheat and other grains, meaning it has lectin-blocker properties. 

Its abilities to reduce many digestive problems, as well as joint pains, make it a must-have ingredient in dietary supplements – like Gundry Lectin Shield. 

Despite its many benefits[1], it has a few noteworthy side effects if you’re considering Lectin Shield. Its most common side effects include mild diarrhea, an upset stomach, and indigestion. 

Moreover, individuals who are allergic to shellfish are recommended to not consume products with NAG because they may cause rashes, windedness, and wheezing. 

200mg Bladderwrack

Bladderwrack is a type of brown seaweed that is in the kelp family. Its well-known benefits include: relieving constipation or diarrhea, helping with Gastroesophageal Reflux Disease (GERD), and relieves stomach acidity by creating a barrier between your sensitive stomach lining and stomach acids. It also lowers inflammation by blocking lectins, in turn relieving certain digestive issues. 

Bladderwrack is also used in many medications that heal wounds. Previous studies show that Bladderwrack consists of calcium alginate that may help heal wounds faster in comparison to other methods. 

Even though Bladderwrack proves to be beneficial in most cases. People who are allergic to iodine will have to consider looking into a product without Bladderwrack due to its high concentration of the substance.

100mg D-Mannose

Mannose-binding lectin (MBL) is a lectin that is instrumental to the body’s immune system by attaching to foreign invaders like bacteria, viruses, and yeast. Studies[2] show that MBL binds to a range of sugars, including N-acetyl-D-glucosamine, mannose, N-acetyl-mannosamine, fucose, and glucose. This stops the protein (lectins) from interacting with different viruses, bacteria, yeasts, and fungi. In simpler words, D-Mannose has lectin-blocking properties – fulfilling the main objective of Dr. Gundry when he designed Lectin Shield.

D-Mannose’s antioxidant properties help it block harmful lectins from entering the digestive tract.

Many researchers show that D-Mannose contributes to functions of the liver and blood’s health when consumed in a moderate amount. However, consuming more than the suggested dosage may have you dealing with kidney impairment. Hence, it is necessary to be mindful of the consumption of D-Mannose.

With that said, it is highly unlikely for kidney impairment to be one of Lectin Shield’s side effects due to the small percentage of D-Mannose that is present in Gundry MD Lectin Shield.

100mg Okra Fruit

As assumed by the name, okra is a fruit that is a common ingredient in most people’s daily diet. However, some lesser-known facts about okra are that it contains a substantial number of raw polysaccharides (RPS) that can bind with different types of lectins.

RPS has been proven to reduce, illuminate, and prevent harmful effects that lectins may have on the body. 

Okra also contains polyphenol, a chemical with antioxidant, antibacterial, and energy-boosting properties, making it a valuable addition to Lectin Shield ingredients. Alongside polyphenols, okra also contains potassium, Vitamin B and C, folic acid, and natural dietary fibers. The benefits that each chemical is capable of providing to our body give Gundry Lectin Shield an upper hand against other lectin blockers. 

100mg Mucin

Mucin is a kind of protein extracted from some animals’ epithelial tissues, more particularly snails. Its slimy consistency contributes to the creation of a slippery protective barrier in our digestion system. This barrier helps in blocking out unsafe lectins and keeps them at bay.

Sialic acid is also found in Mucin. The acid has lectin-binding properties that stick to many food sources such as wheat and some kinds of berries. 

Some other benefits of Mucin include dry skin prevention, anti-aging properties, and boosting collagen production, allowing Lectin Shield to offer some skin benefits too.

100mg Sodium Alginate (Alginic Acid)

Sodium alginate is the sodium salt form of alginic acid and gum, which is mainly extracted from the cell walls of brown algae. Its positive effects include controlling cholesterol and hypertension. 

Alongside these, it has lectin-blocking properties and promotes regularity. 

Since it is a sodium salt, it is generally considered safe with no known side effects that have made it a cause for worry. Out of the many ingredients present in Lectin Shield, Sodium Alginate is the safest.

50mg Vegetable Peptase

Vegetable Peptase is one of the many kinds of protease enzymes that help in aiding digestion while also working well with certain proteins. In the case of Gundry, MD Lectin Shield, it is most beneficial due to its ability to break down harmful proteins in our digestive system. 

Additionally, it is also well-received because it releases pain, reduces inflammation, and prevents certain stomach infections. 

Most doctors suggest that Vegetable Peptase dosages need to be high to be effective to the consumer. This is why Dr. Gundry suggests taking two capsules with each of your two meals – meaning four capsules per day. 

50mg Methylsulfonylmethane (MSM)

 Methylsulfonylmethane, also known as MSM, complements the NAG ingredient. It is recognized as a powerful agent for joint pain or discomfort and works by reducing inflammation. 

It is especially effective when combined with N Acetyl D-Glucosamine because both chemicals work to block lectins, and their combination has a stronger effect than their stand-alone abilities. 

Many consumers have stated that consuming MSM in high dosages has led them to experience mild side effects like diarrhea and indigestion. These issues often come up in Lectin Shield reviews, too, and its major cause is the inclusion of Methylsulfonylmethane in Lectin Shield ingredients. 

50mg Larch Arabinogalactan

Lastly, Larch arabinogalactans are known to be starch-like chemicals that are found in many plants. One of the significant benefits of Larch arabinogalactans is their gut lining nourishing ability. This is achieved by increasing your body’s level of butyrate, in turn making them resistant to harmful lectins.

Larch arabinogalactans help with other common health issues like cold and flu, hence their inclusion in many dietary supplements. Making it a part of Lectin Shield ingredients ensures a healthier immune system and lower cholesterol levels – more impressive benefits achieved by consuming Larch arabinogalactans. 

Arabinogalactans are considered safe to consume. However, this does not eliminate them from side effects. Some commonly experienced side effects include bloating and flatulence (aka intestinal gas). Doctors also advise against consuming Larch arabinogalactans if you have an autoimmune disease, as this substance is capable of aggravating the symptoms.

The formula includes various milligrams of each ingredient, ranging from 50 to 300mg. Many of these ingredients can block and break down the lectins before they can enter your digestive system. At the same time, the remaining ingredients have lectin-binding properties, and together, these ingredients provide noteworthy benefits such as aiding digestion, pain reduction, weight loss, and loss of appetite.

Alternatives To Gundry MD Lectin Shield

lectin protect

Lectin Protect

See Lectin Protect Review

  • Vegetable Capsules
  • No binders, fillers, or preservatives
  • It promotes organic and lectin-free living.
  • May cause allergic reactions like rashes on the skin
  • Some consumers claim to have pasty mouths after consumption
lectin guard

Lectin Guard

See Lectin Guard Review

  • Powerful lectin defense
  • Boosts energy and gut health
  • Formulated by a doctor and backed by science
  • Decrease in energy
  • Intestinal cramping and mild diarrhea

Health Benefits Of Gundry MD Lectin Shield

Gundry MD Lectin Shield is a digestive enhancement formula that was created to relieve the ill effects of harmful lectin proteins that are often found in many natural and preservative-based vegetables and plant products that most people consume daily.

As per the official website, Lectin Shield helps to protect the body against high-risk lectins by eliminating and blocking the toxic compounds from the body.

Lectin Shield is well-received by consumers due to the many health benefits it provides. Some of these are:

Promotes Intestinal Health

As mentioned on Lectin Shield’s bottle, it claims to support intestinal health and promote digestive strength. Daily consumption of this supplement may boost the functional capacity of our body’s small and large intestines, resulting in them running at an optimal rate. It is scientifically proven that a healthy digestive system digests complex carbohydrates, fats, and proteins more quickly and effortlessly.

Helps Reduce Bloating And Gas Formation

Our bodies experience gastronomical bloating when an excessive amount of gas is trapped in the gastrointestinal (GI) tract. The formation of these foul-smelling gasses can be formed by something as simple as heavy food intake. According to the manufacturer, Lectin Shield helps reduce these gasses from forming, ultimately reducing bloating.

Reduces Cravings Of Lectin Foods

Recent research states that not all lectins are harmful; still, many unsafe lectins are lurking in the shadows of popular foods such as tomatoes, berries, lentils, chickpeas, peanuts, and many more. The core ingredients in Lectin Shield are favored for their lectin-blocking and binding properties, hence giving the supplement the ability to curb one’s appetite and regulate their daily food intake.

Other benefits include an improved immune system, bowel movement, and potential weight loss. Although Dr. Gundry has not published any research stating that Lectin Shield is a weight loss supplement, many consumers have reported that they have seen tremendous results after regular intake of Gundry MD Lectin Shield.

Lectin Shield Side Effects

Since Lectin Shield is created with natural ingredients that have a vast number of benefits on their own, it’s no surprise that there is no mention of side effects – at least not by the majority of consumers. 

However, each individual’s experience may vary. While not in a significant number, consumers have reported experiencing minor side effects after consuming Lectin Shield. Lectin Shield side effects include:

  • Mild Diarrhea
  • Nausea
  • Rashes
  • Hives
  • Cramps
  • Loss of appetite

Gundry MD Lectin Shield Dosage

The founder and creator of Lectin Shield, Dr. Steven Gundry, recommends taking two capsules twice per day along with two of your biggest meals. Preferably those meals should contain lectins.

Additionally, the dosage of each ingredient is mentioned on the bottle. Since many ingredients are under-researched, it’s best to consult a qualified MD to avoid any unforeseen Lectin Shield side effects.

Gundry MD Lectin Shield Reviews: What Do Users Say?

Lectin Shield’s stellar benefits may have piqued your interest and have you wondering if it works. The best way to do this is by browsing through customer reviews and complaints to determine if the pros outweigh the cons or vice versa. 

To help you make an informed decision, we looked at lectin shield reviews by customers and noticed a remarkable difference between the positive and negative reviews – with positive outcomes leading. 

As per Lectin Shield amazon consumers, the supplement has helped reduce bloating, crazy junk food cravings and, in some cases, helps shed pounds too. 

Other users stated that Lectin Shield helped them with their osteoarthritis and Irritable Bowel Syndrome (IBSD), which were previously uncured even after regular intake of prescribed medication.

Even though the pros to cons ratio sides with Lectin Shields, a few customers were not particularly happy with purchasing these supplements. Their reasons for negative Lectin Shield reviews are gout attack, heartburn, and most commonly, ineffective – even after regular intake and consumption of all 120 capsules available in the bottle. 

Where To Buy Gundry MD Lectin Shield?

You can buy Lectin Shield at Gundry MD’s official website. The benefit of ordering through their website is a lectin shield coupon code that offers a major discount of up to 20%. 

If for any reason you are unsatisfied with the product, you’re covered with a 100% money-back guarantee that extends up to 90 days after you’ve made the purchase. 

Lectin Shield is also available at Amazon f. But, unlike Gundry MD’s official site, Amazon only allows a full refund or replacement if the supplement is returned in its original condition within 30 days of receipt. 

The Bottom Line: Should I Buy It?

Ranked as Number 3 by Romance University under their “Best Lectin Blocker of 2021 – Reviewed and Top-Rated”, you should consider this powerhouse supplement if you’re not allergic to shellfish. 

Lectins are carbohydrate-binding proteins present in most plants, especially seeds and tubers such as cereals, potatoes, and beans. These everyday foods may not seem harmful, but their high concentration of phytohaemagglutinin – a kind of lectin found in plants, especially certain legumes –  is enough to cause several health issues like hormonal fluctuations, severe abdominal cramps, and rheumatoid arthritis.

To avoid opening the door to many such concerns, we – along with many consumers – suggest buying Lectin Shield. Its natural formula has notably the least amount of side effects and a vast number of benefits that’ll help you maintain a healthy diet efficiently and seamlessly. 

Frequently Asked Questions

Is Dr. Steven Gundry a Real Doctor?

Yes, Dr. Steven Gundry, the founder of Gundry MD, is a real doctor. He owned his clinic, The International Heart & Lung Institute for Restorative Medicine. He was one of the leading cardiac surgeons before becoming the New York Times best-selling author for his book The Plant Paradox: The Hidden Dangers in “Healthy” Foods That Cause Disease and Weight Loss. 
He then shifted his focus to wellness medicines and founded Gundry MD.

What Are Lectins and How Are They Harmful?

Lectins are carbohydrate-binding proteins that act as agglutinins, antibodies that cause particles to congeal in a group, which then occur in the blood serums of humans. These ‘bad’ antibodies can react against the body’s own tissues, eventually causing autoimmune disease.  

Due to their binding properties, lectins can cause nutrient deficiencies, disrupt digestion, and cause severe intestinal damage when consumed in large quantities by an individual with dysfunctional enzymes.

What 3 Foods to Avoid When Concerned About Excessive Lectin Intake?

Dr. Gundry advises staying away from 3 kinds of food. They are corn, meat from corn-fed animals, and A1 milk. Additionally, he recommends limiting consumption of certain fruits like berries, nightshade vegetables like eggplants, potatoes, etc., and legumes such as lentils, beans, chickpeas, wheat, and other grains.

How Severe are Lectin Shield Side Effects?

Despite Lectin Shield’s many benefits, you may experience some side effects, especially if the formula conflicts with any of your medical conditions. If consumed with a higher dosage than your body can carry, you may experience looseness of the bowels, heartburn, and indigestion, as well as rashes, windedness, and wheezing if you’re allergic to shellfish. 

Lectin Shield Scam or Legit?

The founder, Dr. Steven Gundry, and his wellness organization Gundry MD are both legit. Dr. Gundry has published many best-selling books about the Plant Paradox- including cookbooks that give the general population an idea about the harmful effects of lectins when consumed excessively.
This theory[3] has grown in every health-conscious person. The exclusion of lectins from the diet could become the next “food fashion”, especially as some evidence suggests, that certain lectins may be harmful to health.

Does Lectin Shield Help with Weight Loss?

Lectin Shield is not marketed as nor claims to be a weight loss supplement. Instead, it was formulated to solve digestive concerns and other medical conditions caused by unsafe lectins. 
With that said, Lectin Shield states that its formula is effective against bloating. And, since it works towards increasing the digestive system to work at an optimal rate, there is a possibility that some consumers may experience weight loss.

Although not one of its well-known and leading benefits, Lectin Shield has shown significant weight loss results among a few individuals. One such consumer is an Amazon customer who claims to have lost 22 pounds, while another consumer mentions a loss of 6 pounds after regular intake of Grundy MD Lectin Shield.

+ 3 Sources

Tnhealth has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical associations. We work mostly with peer-reviewed studies to ensure accurate information. We avoid using tertiary references. You can learn more about how we ensure our content is accurate and current by reading our editorial policy.

  1. Bissett, D.L. (2006). Glucosamine: an ingredient with skin and other benefits. Journal of Cosmetic Dermatology, [online] 5(4), pp.309–315. Available at: https://pubmed.ncbi.nlm.nih.gov/17716251/.
  2. ‌Turner, M.W. (2003). The role of mannose-binding lectin in health and disease. Molecular Immunology, [online] 40(7), pp.423–429. Available at: https://pubmed.ncbi.nlm.nih.gov/14568388/.
  3. ‌Panacer, K. and Whorwell, P.J. (2019). Dietary Lectin exclusion: The next big food trend? World Journal of Gastroenterology, [online] 25(24), pp.2973–2976. Available at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6603809/.


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