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A nutritional analysis for the dietary food intake and serum vitamin B12 (cobalamin) level of a group of 6 vegan children aged 7 to 14 who had been living on a vegan diet for 4 to 10 years suggests that consumption of nori may keep vegans from suffering vitamin B12 deficiency.

Rauma et al. also reported that vegans consuming nori and/or chlorella had a serum vitamin B12 concentration twice as high as those not consuming these algae.

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