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Deflect - Lectin Blocker (Blood Type O)

37 Customer Reviews Write a Review

The original shield against lectins. Designed to block problematic food lectins known to negatively impact Blood Type Os.

Select your blood type: O A B AB

Sometimes, Avoids are simply unavoidable.

Meet Deflect O, your first line of defense against lectins in Avoid foods. A class of proteins that bind to the different antigens in each blood type, lectins can harm immune and digestive function. This causes a variety of health problems including intestinal and bowel irritation, bloating, weight gain and lethargy. Shielding your biology from these dangerous molecules is important.

An exclusive blend of glucosamine, bladderwrack and sodium alginate, Deflect O is crafted for optimal absorption by Blood Type Os. Dr. D'Adamo's uniquely designed formula provides specific blocking sugars that attach to receptors on lectins, preventing them from weakening immune and digestive health.

  • Knocks out specific Type O dietary lectins before they hinder digestion
  • Boosts metabolism
  • Reinforces immune defenses

Our lectin-fighting team includes:

N-Acetyl D-Glucosamine (NAG)
Acts like a magnet for lectins in foods such as wheat and other grains. When lectins bind to the NAG on your cells, they impair their functioning and promote inflammation.The NAG in Deflect serves as a distractor, picking up stray lectins without interrupting your metabolism.

Bladderwrack (Fucus vesiculosus)
Binds to unfriendly bacteria and viruses such as meningococcal bacteria which causes bacterial meningitis herpes simplex, E. coli and several strains of Candida. When bladderwrack attaches to harmful microbes, it prevents them from sticking to the intestinal tract, where they can hinder digestive functioning.

Sodium Alginate
Binds lectins in the digestive tract and prevents their absorption. A natural polysaccharide product extracted from brown seaweed that grows in cold water regions, its binding properties come from its solubility in cold and hot water with strong agitation, which makes it thicken and bind.

Click the Play button to hear to Dr. Peter J. D'Adamo discuss Deflect.

While it can't magically turn Avoids into Beneficials, Deflect O may assist in healthy weight loss and the repair of pre-existing lectin damage. With the help of our formula, you can support a balanced digestive system.

Dosage & Information

For maximum benefit: take two (2) capsules two to three times daily with meals
(As a dietary supplement or as directed by a physician)

120 vegetarian capsules
Is this Product Vegetarian? No
Contains crustacean from N-acetyl D-glucosamine (isolated from crab shell)

Does not contain: sugar, salt, gluten, wheat, yeast, corn, soy, eggs, dairy, preservatives, color, flavors or artificial ingredients

For California Residents

Prop 65 Warning

WARNING: Consuming this product can expose you to Lead, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to


Recommended Reading

Following The Blood Type Diet On the Go Lectins & Blood Types The “Fad Diet” That Might Just Save Your Life
Write a Review
  • i definitely recommend this product

    Posted by Dora Ponnequin on Jul 31st, 2020

    It is a great product, it help me with the 'avoids" that sometimes I cannot really avoid while I am out dinning with my family.

  • Deflect is good for you!

    Posted by Betsy A Ross on Mar 26th, 2020

    I've been taking Dr. D'Adamo's products for almost as long as they've been on the market. I trust that they will contain only items that are compatible with my blood type and free of unnecessary ingredients.NAP is the gold standard in my book.

  • Deflect

    Posted by Farika B on Jan 1st, 2020

    I see people saying they don’t think it works. I believe the proof is in the poop. The one thing I know is expelling harmful intake is always a good thing and this aids in the elimination process of eating poorly. I can guarantee that I will feel better the next day after taking this the day before as prescribed. Unlike the sluggish sick feeling I have when I eat poorly and don’t take Deflect. Works for me!

  • Deflect

    Posted by Anonymous on May 14th, 2019

    This product is the best. It helps me feel better and actually assists in weight loss.

  • It really helps!

    Posted by Anonymous on Mar 1st, 2019

    This formula really does assist with helping your body "deflect" the effects of foods that are normally not a good fit for your blood type. However, it's not a remedy for a poor or unhelpful diet. If I am consistently eating non-beneficial foods it doesn't help stop the symptoms/effects of eating bad However, when I slip on occasion, I find that this works. I even take it when I am unsure of ingredients in food that may affect my blood type like when eating at restaurants, etc. It appears to work with helping the body eliminate with the assistance of the Larch Arabinogalactan fiber. At least that's my observation.

  • did not notice any benefit from my use of deflect O

    Posted by Tyavyar Akosu on Jan 13th, 2019

    I have used the supplement for two months ususally when I take foods that are avoid for my blood group/SWAMI recommendation. i have not noticed any improvement from the joint problems (arthritis) that has been causing me lots of problems.

  • Really works!

    Posted by Pam C on Dec 26th, 2018

    Used this product over the holidays for meals where I had no control over menu. No stomach pains and I didn’t feel bad. So very helpful to be able to enjoy those gatherings!

  • Great product

    Posted by Miriam on Nov 8th, 2018

    I have been taking Deflect O for some time now. It protects my body harmful foods that gives me inflammation. I have learned what foods to avoid and this has helped a lot as well.

  • Amazing results

    Posted by Tiffani A. on Oct 14th, 2018

    I ordered the Deflect O about a month ago and I take it almost anytime I’m going to eat something outside of my blood type guidelines. It helps the symptoms of corn, dairy, wheat and so much more! I haven’t bloated because of food or had that horrible stomach pain since I started taking this. Love it!!!!

  • Wonderful Product

    Posted by Anonymous on Oct 4th, 2018

    It allows me to eat some of my favorite foods without allergic reaction.

  • Can feel that it works just few minutes after taking!

    Posted by Fidel on Aug 29th, 2018

    I could never be btd 100% compliant because I sometimes eat out or eat foods cooked by others. This product protects me, I can feel it!

  • Improved digestion immediately

    Posted by Brooks on Jul 5th, 2018

    This product has improved my quality of life significantly. After having severe digestive issues for nearly a decade with even the most bland foods, this product has enabled me to reincorporate several foods that allow me to feel somewhat normal again. Will use this product daily for the foreseeable future.

Practitioner Technical Information

Must login as a practitioner to have access.

Deflect O TRM

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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