I sent off for a private DAO test and it came back at 7. Apparantely over 3 up to 10 shows an intolerance and over 10 extremely intolerant. I haven't started antihistamines yet but I guess I should try? or look at low histamine foods, which foods don't you eat to help and which supps?
Ah, at last, someone I can talk shop with about DAO and histamine ;-). So my hunch was dead right!
As it's "your" thread and seems a histamine thread, I won't hide the details...
Hehe, funny, you made the same mistake as me with "over 10". DAO is an enzyme which degrades histamine. So if is high, that means it can balance the histamine. Over 10 would mean it's no problem, it's "under 3" that makes us extremely intolerant. I had 20, so my DAO is OK. But yours isn't I agree.
Regarding antihistamines I don't know how med-tolerant & how active you are. If it helped my fatigue but made me more tired, I still wouldn't be able to concentrate / work and would have a worse quality of life. Experienced that with amitriptyline, melatonin, L-tryptophan and CBD oil. But the antihistamines recommended by Klimas and Chheda are Benadryl (more for hives) and Famotidine (more for stomach acidity).
And regarding diet I don't know how easy you can change, an antihistamine diet is a pretty tough one - and I'm very diet-hardened.
But I'm concentrating on eating more foods with low histamine, rather than less with high histamine. So I'm increasing my gluten-free muesli with a few berries (actually there are a few histamine ones like strawberries in there, but not much) and leaving nuts (walnuts & cashew are worst) and dry fruits (figs are among the worst) out of it, although I actually desperately need nuts for lipids and cos I'm pretty vegan
(anyone remember Pretty Vacant by the Sex Pistols? ) - maybe I should do a cover version: "Pretty Vegan" by the Massage Pistols (seriously - anyone want me to try?). I've greatly increased pumpkin seeds cos they're good for so much and I love them too, and decreased nuts & dry fruits to compensate. For the other 2 meals (= 3 cos of lipids) I've greatly increased my veggies (usually raw anyway, and actually fresh has least histamine), esp. broccoli (raw too), but also carrots, endive/chicory, yellow peppers, sweet potatoes (raw, I hate them cooked), cucumbers. No tomatoes, avocados, spinach, and eggplant. Problem is there are loads of different lists, probably it's once again very individual. Rice is said to be better white/parboiled, but I only like wholemeal, so not sure on that, and potatoes some say are OK, some don't, and I often seem to react to the solanine or something. Since I drink mainly soy milk, I'm increasing chamomile and fennel tea, both OK, and maybe a bit more almond milk. So compromises of course.
In case you need more basics & less details, the big DONT's are things like alcohol, food additives, gluten,
cheese, canned & pickled food (e.g. olives), beans.
Supps - I use the recommendations by Klimas, Chheda & Hoffman (hoffmancentre), all fairly similar.
The latter's "A-Team" (he has a "B-", which I'm getting on to this week, and a "C-Team" too) are
Quercetin – 2000 mg daily, dose divided
Green tea (EGCG, L-Theanine) – 2 to 3 cups daily. Supplement with 500 mg (175 mg of ECGC) twice daily
Curcumin (Meriva is a common brand name) – 1 to 4 g daily, dose divided
Chamomile tea (Apigenin, luteolin) – 1 to 2 cups before bed
Resveratrol – 20 mg twice daily
Diamine oxidase enzymes (DAO) – 2 capsules with each meal
Vitamin C – may need a non-citrus source such as rose hips – 1 to 3 g daily
I was taking 1 and 5 anyway (together; away from meals; for sleep, inflammation, lipids & blood pressure), 7 seemed to make it worse, like NAC, but adding it has been good. Added 2 (as supp, not tea) and 4. 3 I don't tolerate.
6 would be exactly the enzyme DAO which you don't have enough, and I apparently do have. But I'm still going to try it, maybe it'll help make the dietary changes less extreme. Most products use pigs kidneys and I hate using animals, so I've gone for a plant based type, NATURDAO, which may be less effective. Amazon reviews from Europe and the US are favourable tho.
What Klimas & Chheda is less (still looking for more by them tho): Aside of quercetin and vitamin C also NAC & riboflavin. NAC I've stopped which helped, due to a study saying it decreases DAO but the latter (= B2) I'm taking.
My own personal secret is GABA, after reading that histamine decreases GABA, which is my main supp anyway.
I've increased mine up to 4x.6g/d. Every time my sinuses start burning, I know I need to take the next dose and that helps.
I'd be glad to hear how you get & carry on!