ME/CFS: vitamin B upset their stomach, raw beef liver preferred

Summary

A person with CFS said vitamin B supplements upset their stomach and, judging by neon-yellow urine within an hour, were mostly not absorbed. They said supplements are not effective in all cases and preferred eating raw beef liver, cut into two-ounce frozen chunks, two to three times a week. They gave no details of how long they had been ill, how severe it was or how they fared overall.