Vitamin B12, also known as cobalamin, is the only vitamin that contains metal elements. Vitamin B12 is red crystalline powder,odorless and tasteless, slightly soluble in water and ethanol, the most stable under the condition of pH 4.5-5.0 weak acid,decomposed in strong acid (pH<2) or alkaline solution, it can be destroyed to a certain extent when heated . Higher animals and
plants cannot manufacture vitamin B12, and vitamin B12 in nature is synthesized by microorganisms
plants cannot manufacture vitamin B12, and vitamin B12 in nature is synthesized by microorganisms
