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“Histamine Block” Does NOT Block Histamine!

Histamine Block, the diamine oxidase (DAO) supplement I told you about does NOT block histamine! After my fifth loved one asked about “that histamine blocker you’re taking,” I thought I should explain the difference explicitly.

DAO is a digestive enzyme that breaks down histamine in food and histamine that’s released as part of digestion. Not everyone produces sufficient amounts of DAO. Histamine Block contains that enzyme (from pigs). This is what all DAO supplements do — they do not block histamine, they temporarily give a person the enzyme that breaks down histamine in the digestive tract.

It’s easiest to explain in terms of a well-known enzyme deficiency, lactose intolerance. People who are lactose intolerant have a deficiency in the enzyme called lactase. Without sufficient amounts of lactase, the digestive tract cannot properly break down lactose. Some lactose-intolerant people can take Lactaid, a lactase supplement, to eat products that contain lactose without symptoms.

Similarly, some people can take DAO and eat foods that contain or release histamine that they could not tolerate without supplementing the enzyme. Others, like me, can’t even effectively process the histamine that is always released as part of digestion, even if they eat low-histamine foods. (To complicate matters, insufficient DAO production is not the only reason a person could have trouble with dietary histamine.)

Why is the supplement called Histamine Block if it doesn’t block histamine? Marketing. A name like Histamine Block tells consumers before they look at the fine print that that the product is likely to reduce histamine-related issues. It also confuses people who want to understand how the product works and what it does.

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8 Responses to “Histamine Block” Does NOT Block Histamine!

  1. Frank F says:

    I use DAO to neutralize the problems I have whenever I accidentally consume any MSG.

    I have no problem with foods high in histamine, however I am extremely sensitive to MSG and all its numerous other names, i.e. anything autolyzed, hydrolyzed, modified _____ starch, etc, I’m guessing my gut is producing the histamines, when I ingest any of this MSG containing crap. The reactions I have take about 8 hours, and it takes about a week to completely flush it out of my system.

    There are only three things that help, a steroid shot, an oral steroid pack, or DAO. The
    DAO is actually more effective than the steroids. The relief is within about five minutes. I do need to take 6 enzymes capsules several times an hour for the first couple of days depending on how much MSG I have in my system.

    One of my friends, also has no problem with foods high in histamine, but gets migraines from MSG.
    She had a migraine for 3 days, and asked me about the enzymes I take for my MSG problem. I gave her 6 of the DAO capsules. She said, within five minutes she felt a tingling in her head and the headache was gone.

  2. Mary says:

    Hi, I was going to buy Histablock based on your recommendation, but the Amazon reviews say that it no longer contains DAO. It does, however, contain quercetin and bromelain, which are supposed to help aid the body in making more DAO. Do you still think it’s effective without the actual DAO enzyme? Histame is the same…no DAO.

    • Brth says:

      I’d be interested to know, too. It seems like all of the DAO containing products are out of stock due to a shortage.

  3. Vanessa Finney says:

    To the last commenter, Amazon is not the only place to get the supplement. I just called my local integrative pharmacy, Pharmaca, and they carry it.

  4. Joy says:

    This is response to Mary. perhaps you are not accessing the right brand. On the Seeking Health website it says “Histamine Block by Seeking Health contains a patented enzyme formula providing 20,000 HDU of diamine oxidase (DAO) – the main enzyme responsible for the degradation of ingested histamine – per serving (2 capsules). Hope this helps. I’m definitely going to try it when it comes back in stock.

  5. Tammie says:

    Unfortunately DAO is now only available in the US from one company, umbrellux.

  6. Tammie says:

    Got my order from Umbrellux – very happy with the quality and very happy to have back my DAO!

  7. Amber says:

    I get a headache every time i ever eat, period, no matter what is in it. I’ve developed what could possibly be described as an eating disorder now, even though I’m not insecure about my weight and have no control issues and don’t feel the need to starve myself, etc. However, i do know that every time i eat, I’m going to get significant pain from a migraine, and so its been torture for twenty years. If this is true, and there’s a product that can help, all i can say is that this is a miracle that i found this info finally after being on disability for these for years, and thank you to the author for the research and for sharing her story, and to the readers for the updated info. I could not find any dao in the brand names she listed either and was getting tearfully discouraged. Lol thank you all so much.

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