Onions:
Yup, it might be uncommon... but there are a lot of people with it, which makes the Internet one cool tool!
There are a few different groups of "problems".
Mine allows me to enjoy GARLIC, but
Onions, Chives, Cilantro, Leeks, Shallots are a NO NO!
Raw, cooked, powdered
I've traced the problem back to the following;
I ate a lot of onions and onion rings as a kid.
I took a LOT of TETRACYCLINE between ages 15 and 18.
The problems began at about age 16.
I have a SLIGHTLY ELEVATED Liver Enzyme.
I get, to varying degrees, headaches, fatigue, loss of coherence (dizzy thinking), photo sensitive, reddish skin tone.
The worst is that I fear a hear attack, as it seems to affect an enzyme in muscles, and I have collapsed, twisted my ankle, and had the inability to stand, walk, hold on to anything. Yes, it's really hard when people make soup, stew, Italian, Mexican. Pretty much, if I don't make it, or KNOW the person that mad it, I am suspect. I know I'm not alone, I just wish there was a cure, a pill, or something to make it POSSIBLE to enjoy them... but I've walked through a kitchen with onions cooking, and fell! If I TOUCH something with onions in it, with my left hand, I feel a pain shoot up my left arm... gotta love it... !