I just got back from lunch - I had french fries with ketchup (my kids are with me today, so I splurged) and I feel rotten! I've noticed this before with french fries and ketchup - hot face, brain fog, sore throat, itchy face and arms within half an hour of finishing. Anyone else have this? Is it the potatoes? The tomatoes? The sugar? or wheat in the oil from previous frying of chicken nuggets? (I don't eat any wheat.) I have heard talk here of tomatoes and potatoes being a problem, yet I haven't noticed this problem when I eat them fresh. Speaking of common food allergies, we eat so much corn, potatoes, and tomatoes because of our huge garden that I don't think I could maintain a happy marriage without them (I'm exaggerating, of course). A few days ago I suggested I might try giving up corn for a few weeks to see if it made a difference and my husband told me I was thinking myself into food allergies. So what are the most common food allergies here? How did you find out? Is it worthwhile to keep a journal of everything you eat and how you feel?