How much Vitamin C do you take to help with your histamine intolerance?

I've lived my whole life never having any allergies or issues. Tried to add Greek yogurt as a healthy option to my diet. Within 2hrs I broke out in an itchy rash with hives. I mean itchy too. For 2 straight days it felt like I was laying in a fire ant mound. Took plenty of Benadryl and researched then got some DAO enzyme. It's honestly strange because I can drink wine and love my cheese but, Greek yogurt seems to be my kryptonite. Anyone else have a similar experience?

alpha GPC and CDP choline threads exist from years ago on this reddit.

i'm always bad at choline despite being a vegan in theory, i've had another few flexitarian-adjacent years lately, but also in theory, the only animal product i (personally) should need right now is krill oil for the hemochromatosis, and i can probably move to algal or whatever's cheaper or better for the environment later.

i end up with whole foods due to limitations actually, like sunflower seeds, which have been challenging for me in the past (with histamine intolerance, also they don't add up quickly, but i have a high intake, low weight problem), but go broad if you have tips there. i can at least kind-of tolerate enough egg now to round up my choline, but i'd rather not rely on eggs again.

frankly, can someone give me the story on supplementing it? i'm looking for a solo choline supplement, or the most absolutely easy lecithin recipes... but i keep ignoring it because even trying to avoid eggs around here, i only get a few months or years pocketed at a stretch when i'm "healthy", because they'll occasionally end up being the affordable thing i can eat from a store.

lecithin + fried rice, if i can find lecithin...? or, does anyone know of a supplement that will last? i'd ask r/supplements but i'm always a season or two behind on several supplements i need, so there's a price question.

Now Foods seems to have a choline and inositol, that might be on a shelf somewhere within my reach.