Have you ever taken a food intolerance test? Which type did you take? and What was the outcome?

After years of struggling with IBS I’m thinking about taking a food intolerance test but am aware of the expense and also the controversy about them. However, I have tried pretty much everything and had all sorts of investigative procedures to eliminate anything serious.

I would like to know your story and specifically what type of test you have taken, As far as I am aware there are:

Cytotoxic Blood Testing
The vega-electro acupuncture test
Applied Kinesiology and
Hair Sample Testing

Thank you