B vitamins are a group of vitamins, in the eight vitamins are combined, all dienen.Die as precursors for coenzymes numbering is not continuous, because the vitamin effect could not be confirmed in many substances that originally were considered vitamins. The B vitamins are divided into vitamin B1, B2, B3, B5, B6, B7, B9 and B12.

B vitamins come in animal and vegetable foods before (z. B. in fish, liver products, dairy products, broccoli, spinach or kale). An exception is vitamin B12, which is hardly contained in plant foods, but, unlike any other water-soluble vitamins can be stored in the body.