XYMOGEN HistDAO - DAO Enzyme Supplement to Supports Healthy Degradation of Food-Derived Histamine - Diamine Oxidase for Digestive Health 20,000 HDU Per Serving (60 Tablets)

This is absolutely the gold standard in DAO supplements available on Amazon. I have tried several brands. They’re all kind of expensive, but nothing works like this one. I take it first thing on waking and wait 20 to 30 minutes for best effect. Love how small the pills are. Apparently the blister pack makes a difference? I don’t know why these work so much better. But this is the one you wanna get.

My symptoms are much worse if I do not take this before my evening meal.

Great SellerArrived just as described, on time, great conditionwill shop with this seller again

Very effective histamine blocker

Works as described. Arrived on time. 3 stars as would prefer if the lightweight paper box were sealed in an outer package or envelope - weird to receive medication in the mail with no layer of protection. Too easy to tamper with. Box arrived smashed. Luckily the pills were ok.

It helps.

I’m in tears. For years anytime I eat out at a restaurant I get sick, a headache and so lethargic I basically go home and collapse into a nap, or feel like crap the rest of the day. For the first time in as long as I can remember I can eat food again without feeling like death. It took so long to figure out what the problem was and it turns out it was just this simple issue with my bodies reaction to histamine.

When I have this enzyme before a meal I notice that my stomach is noticeably flatter as I am digesting the food. Also, I'm digesting my food better as noted by the output. I have had intestinal surgery and I have no colon so my guts have impaired enzyme production. I have been trying all kinds of enzymes for different foods and this one definitely helps with tomato and pineapple!