This happened yesterday to myself and my daughter (both paleo for months). We split a chicken burrito: beans, grilled chicken, a bit of sour cream, tomatoes. She ate the tortilla, I did not. This was from a neighborhood taqueria and we watched them make it. I don't know what oil they used but I'm assuming the basic lard every restaurant uses. The only thing that we ate that was out of our normal diet were the beans.
I haven't had any legumes in months but I can't imagine eating these would cause dizziness. We were very, very tired to the point where I felt like we would fall asleep on the 10 minute drive home. We had no energy the rest of the night and were in a general funk.
Does anyone have an idea why this would happen?
It could be a combination of additives and things in the food that caused the headache.
MSG, GM soy oil, weird additives in the sour cream, legume intolerance, cross contamination from gluten since the tortilla touched the chicken. Gluten is glue-like and sticks to everything! Also, when you avoid gluten your tolerance to it goes down so even a small pieces of it are enough to cause symptoms.
Restaraunts love MSG and soy oils, saves them money and it makes mediocre food taste okay and good food taste even better at the cost of peoples health.
I don't know about taquerias, but most restaurants put a surprising amount of sugar in their food. I had to stop going to several Chinese restaurants near where I work because (after a couple months paleo) all their food - meat dishes even - tasted like candy.
Especially if a sauce was involved - even salsa! - it might have too much sugar.
I did miss my favorite taqueria near home - their burritos were so fresh! But one time I was there to pick up a burrito for my wife, and I noticed I could get just the meat as a 'side'. So I got a pint of mixed grilled chicken and beef for something like $6.00 - it was delicious and it lasted for several days of snacks :-)
There could be gluten in the seasoning. They put it in everything. I just don't eat out anymore.
Second best guess would be the legumes. They've never made me dizzy but they certainly do wreak havoc on my stomach acid levels.