Hi there. YorkTest isn’t the only lab in Canada that offers IgG food testing.
Full disclosure - I’m from Rocky Mountain Analytical- a Calgary-based laboratory (accredited by the College of Physicians and Surgeons) that also offers IgG food intolerance testing. I just want people to know there is a credible, responsible laboratory in Canada that offers this test. The literature on food reactions and migraines is growing. Here are some links to information on the association between migraine headaches and IgG food reactions.
ncbi.nlm.nih.gov/pubmed/21835022
ncbi.nlm.nih.gov/pubmed/20647174
ncbi.nlm.nih.gov/pubmed/18693538
Anecdotally, we did IgG food testing for a couple of employees who suffered from migraines (although not specifically vertigo)- and their migraines disappeared when they eliminated the reactive foods (in both cases, dairy was an issue, in one case wheat was also reactive). One of them did a major dairy splurge after several weeks of eliminating all dairy and got a migraine the day after the splurge. Being a lifelong dairy lover, she was pretty crushed, but also appreciated being migraine-free. Do I believe food reactions are the cause of all migraines - absolutely not. There are physiologic factors (blood vessel physiology), genetic factors, hormonal factors etc that all play a significant role. But, do I think there are instances where food reactions are a major contributor? You bet, and the literature is bearing that out. Incidentally, my background is in community pharmacy - I dispensed a lot of migraine and vertigo meds in my day, and I know if I was still working in pharmacy now, I’d be advising anyone using those meds to get a food intolerance test. That said, not everyone can afford to get a test - so, if you can’t afford the test - try eliminating all dairy for 5 or 6 days, then go crazy with dairy foods the next day. If you get a major reaction/migraine on day 7, that strongly suggests you could be having an IgG reaction (antibody levels are still high even after you’ve avoided the food for 5 or 6 days, but there’s no antigen (reactive food) present - when you introduce the reactive food and those antibodies that are still around have their way with them- presto, you have a reaction. It isn’t always dairy, but in my experience, that’s the most common reactive food.