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Deflect - Lectin Blocker (Blood Type A)

23 Customer Reviews Write a Review

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

Select your blood type: O A B AB

Sometimes, Avoids are simply unavoidable.

Meet Deflect A, 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, chondroitin and D-mannose, Deflect A is crafted for optimal absorption by Blood Type As. Dr. Peter D'Adamo's uniquely designed formula provides specific blocking sugars that attach to receptors on lectins, preventing them from weakening immune and digestive health. Deflect A also includes cranberry and pineapple concentrates to aid in maximum absorption.

  • Knocks out specific Type A 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. 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.

Becomes smaller peptides upon breakdown in the stomach, resembling the Blood Type A antigen. These molecules can then bind to A-like lectins and prevent attachment in the intestinal tract.

Has a unique structure that can prevent adhesion of certain bacteria including E. coli and influenza virus by binding to them.

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

While it can't magically turn Avoids into Beneficials, Deflect A 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
  • An appropriate name

    Posted by KSatt on Jul 12th, 2019

    Deflect. That’s really what I feel like it’s doing when I take it. Anytime I know something I’m eating has an “Avoid”, or even unknowingly, Deflect provides a good defense. I still try to avoid the “Avoids”, as nothing completely takes away the symptoms.

  • Really works!

    Posted by Erica on Aug 12th, 2018

    We bought this for our son who has a liver condition. Many times when he eats what's he feels sick afterwards. This has really helped in that he doesn't have as bad stomach cramping and upset stomach with meals. It even helps my husband whose blood type is AB. Thank you!

  • Helped me with weight loss

    Posted by Christy on Jan 19th, 2018

    I’ve been struggling to lose 40 lbs for quite a while, but in the last month after restarting on the blood type diet and adding Lectin blocker, I’ve managed to lose 7 lbs, even over the holidays!! It’s like my cravings for the bad Foods I used to love, has diminished. Thanks Dr. D’Adamo!

  • Works Great

    Posted by Barb Wohlbrandt on Nov 22nd, 2017

    This product works excellent for me and blocks all lectins and stops my symptoms.

  • Great Product

    Posted by Barb Wohlbrandt on Aug 4th, 2017

    This product really keeps all of my symptoms away.

  • Great Stuff

    Posted by Mel WoodfordXTON Cross on Jun 30th, 2017

    We use this product every day to offset the possible toxins we may encounter each day. We find it particularly useful when we travel & aren't always in control of the food we eat.

  • Won't leave home without it!

    Posted by Marie on Jun 19th, 2017

    Love Deflect! Last night had little too much to eat (all good foods) in short time, took 2 Deflects and felt better. I try not to eat "avoids" but if I do, I take 2 Deflects little before meal or with meal. I have a small plastic pill bag that I keep with me at all times. I love how it has all natural ingredients and for each blood type. Highly recommend to everyone whether you are a beginner with BTD or long time user of BTD.

  • My digestion is working better

    Posted by Lauren on Apr 16th, 2017

    Since I started taking Deflect A, my digestion is working better. My stomach doesn't feel bloated and the chronic constipation I have is diminishing so that I "go" every other day instead of waiting 3-4 days. The occasional bloating has disappeared as well. I eat avoids everyday though I try to stick to the Diet and Deflect A is a perfect companion. Wish I'd started taking it years ago.

  • Still my best product

    Posted by Mariarosaria on Dec 27th, 2016

    This is still Mariarosaria, "The biggest fan of the blood type science". I am here to add one more thing on Deflect, and which I did forget to mention in my previous review, the presence of N-Acethyl cysteine, so important for the detoxification process, so prescribed today from all naturopaths, and, yes, in low doses, so we can try and see how they work in our system and take more if we need.

  • A true lifesaver!

    Posted by Debra on Jun 4th, 2016

    I LOVE this product! This supplement has given me the ability to occasionally eat the foods that are not on my diet without feeling ill afterwards. It also helps mitigate constipation from eating the wrong foods and has really aided in my metabolism and weight loss. It is a must-have for anyone eating for their blood type!

  • Less puffy

    Posted by Anonymous on May 14th, 2016

    Thanks to this supplement I fell less puffy. I got this convinction when I wore my shirt and pants. Also front of avoiding food I had more willing to sin....

  • A daily dose of Deflect

    Posted by Anya Ludwig on Apr 28th, 2016

    We take our Deflect everyday to insure that the foods we are eating don't give us any problems, especially when we eat off the "AVOID" list, which sometimes happens. Our digestion has improved with continuous use.

Practitioner Technical Information

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Deflect A 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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