I got back results from some blood tests: Histamine: 122ng/ml(1.1 umol/L) Homocysteine: 12.2 umol/L B12 440 (ref 160-800) I can't find much information regarding figures for histamine levels. Only one site that states: "Professor Pfeiffer and expert in this field considers basophil counts greater than 50 cells/cu mm and histamine levels greater than 70 ng/ml (0.629umol/L) diagnostic for histadelia." Which would make mine significantly over. Anyone have an opinion on these levels? Any histadelics here?