A nutritional analysis was conducted on the dietary intake of a group of 6 vegan children aged 7 to 14 who had been living on a vegan diet including brown rice for from 4 to 10 years, and on that of an age-matched control group. In addition, their serum vitamin B₁₂ levels and other data (red blood cell count, hematocrit, hemoglobin, etc.) were determined in the laboratory. In vegans' diets, 2-4g of nori (dried laver), which contained B₁₂, were consumed daily. Not a single case of symptoms due to B₁₂ deficiency was found. There were no statistically significant differences between the two groups with respect to any of the examination data, including B₁₂ levels (p<0.05). Therefore, consumption of nori may keep vegans from suffering B₁₂ deficiency.