In short: DAO is the enzyme that helps break down histamine from food, and in some of us it works less efficiently. A DAO supplement is usually taken 15–20 minutes before a meal and doesn't "fix" the intolerance — it can only help with a particular meal. Aspirin and alcohol can block DAO. My takeaway: supplements can be a help, not a magic fix — and never without talking to your doctor.
The DAO enzyme is the one that helps break down histamine from food. In some of us it works less efficiently — which is where the trouble starts.
What did I learn about DAO (from experience + what I read)?
- You usually take it 15–20 minutes BEFORE a meal, not after.
- It doesn't "fix" the intolerance — it can only help with a particular meal.
What can block the DAO enzyme?
- Aspirin can block the DAO enzyme — one more reason to discuss any medication with your doctor.
- Alcohol has a similar effect (it blocks DAO).
Everything else (vitamin C, other supplements people talk about) I also approached cautiously: one at a time, in small amounts, keeping an eye on my reactions.
My takeaway: supplements can be a help, not a magic fix — and never without talking to your doctor.
A practical trick: before I try any new supplement, I write it down — what it is, when I take it, how I feel over the next few hours and days. That way I can see clearly whether it actually helps or it's just in my head, and I have something to show my doctor. (And I still decide with my doctor whether it makes sense at all.)