All kinds of cells in your body need vitamin B12. That includes red blood cells and glial cells – the kind that protect your nerves. But your body doesn't make this nutrient on its own.

Engineering Research Center of Ministry of Education on Food Synthetic Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China Science Center for Future Foods, Jiangnan ...