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Abstract
A significant amount of vitamin B12 (52.9±8.9 µg/100 g) was found in the dark muscle of the yellowfin tuna (Thunnus albacares), in comparison to that of the light muscle. A corrinoid compound was purified to homogeneity from the dark muscle and partially characterized. TLC and HPLC patterns of the purified corrinoid compound were identical to those of authentic vitamin B12. These results indicate that dark muscle of the yellowfin tuna would be an excellent source of vitamin B12 for humans and aminals.
Acknowledgment
This study was supported in part by a grant for Comprehensive Research on Cardiovascular Diseases from Ministry of Health, Labor and Welfare of Japan (to F. W.).
