I have it in my coffee every morning (1 tbsp). I've never had a reaction like yours. Sometimes it gets me in the bathroom though. You might have an allergic reaction?? Not sure what would cause that.

If you're getting hives, it sounds allergic, not ketogenic. I'd get some liquid Benedryl and keep it handy. I have read in one low-carb book (see http://www.westonaprice.org/thumbs-up-reviews/life-without-bread) that keto can really ramp up the immune system, and in folks who already have developed autoimmune issues, this can unfortunately sometimes cause inflammatory or allergic responses. But if it's only associated with one food, it's more likely that you're simply unable to tolerate it, or developing an allergy to it.