Designs for HealthHistaGest-DAO - Diamine Oxidase DAO Enzyme to Support Digestion of Histamine-Containing Foods - 20,000 HDU DAO Diamine Oxidase Enzymes (60 Gastro-Resistant Tablets)

A bit expensive, BUT they work really well and are high quality. Also the dispenser packaging is PERFECT for keeping in a purse or bag. I like that it dispenses one into your hand without having to open an entire bottle.

This enzyme is a game changer if you have a histamine intolerance. I take one before I eat at all restaurants, because they all seem to serve something I can’t eat and it’s usually an ingredient I can see. I don’t take anymore risks, I pop one of these in my mouth and it stops any possible reaction I would suffer due to my histamine intolerance.

This product works very well

Works great for my son.

I honestly don't know if this even really does anything. I couldn't eat whatever histamine foods I wanted while taking it, got tired of paying 70 bucks every few weeks, and now eat exactly what I was eating when I took it without issue. (Still have to be low-histamine, just not as broke).

Works well for Mast cell issues

Great product. Really works!

Great. Love the dispenser too. I took one star off for being expensive, especially when you rely on taking 2-3 of these per day to get by.