I came across the following recently, and thought some here might find it of interest. P.S. capital letters below are as found... Tom Billings ------------------------------------------------------------------ West, ERIC D.; Ellis, Frey R. The Electroencephalogram in Veganism, Vegetarianism, Vitamin B12 Deficiency, and in Controls. Journal of Neurology, Neurosurgery + Psychiatry, 1966, v29 (n5):391-397. Abstract: THE EEGS IN 17 VEGANS (EXTREME VEGETARIANS WHO EXCLUDE MEAT, DAIRY PRODUCE, AND EGGS FROM THEIR DIET) WERE COMPARED WITH THOSE OF 18 CONTROLS, 10 VEGETARIANS, 11 PATIENTS WITH PERNICIOUS ANEMIA, AND 2 WITH FOLIC ACID DEFICIENCY. THE EEG SCORING WAS CARRIED OUT BLIND. DIFFUSE ABNORMALITIES WERE FOUND IN THE VEGANS' EEGS OF A DEGREE THAT IS BETWEEN THAT OF THE VEGETARIANS AND THE PERNICIOUS ANEMIA PATIENTS, BUT UNLIKE THE ABNORMALITIES IN THE LATTER, THE ABNORMALITIES IN THE VEGANS' EEGS WERE NOT AFFECTED BY HIGH DOSAGE VITAMIN B12 SUPPLEMENTS.