Kyohei Koseki

Characterization of Vitamin B12 Levels and Compounds in Commercial and Homemade Kombucha

Abstract Vitamin B12 is an essential nutrient produced only by certain bacteria and archaea. Kombucha has been promoted as a plant-based source of vitamin B12 to overcome the risk of deficiency associated with vegetarian diets. In this study, the vitamin B12 content of commercial...

Cobamide Fingerprinting Reveals Nutritional Diversity of Vitamin B12 in Edible Shellfish

In edible shellfish, vitamin B12 content has traditionally been evaluated based on total content; however, recent studies reveal substantial diversity in corrinoid composition among species. This review integrates molecular and ecological perspectives to reassess vitamin B12 leve...