I actually know of other people sensitive to beef. Sometimes a friend of mine who is sensitive to beef will buy buffalo meat when she can buy it. Sometimes beef bothers me, too, so I don't eat it all that often. It constipates me, makes me nauseous and even aggravates the fatigue I get from my autoimmune issues. I never mentioned it before because I have a long list and know to simply avoid eating beef too often if I don't want symptoms.
This problem started with steak. I haven't had a steak in at least 3 years. I do not become completly constipated. I will have 1 bowel movement instead of 2 or 3. Normally, you can set your watch to my bowel movements. I have no problems with chicken or pork or any dairy problems....just beef. I've looked around on the forum but do not see any posts with my symptoms.