Witamina B12 w żywieniu krów mlecznych

Vitamin B12 is synthesised in the rumen by the members of bacterial microbiota. This process requires sufficient amounts of cobalt. Vitamin B12 content in the rumen of dairy cows depends on ruminal microbiota composition. Cow’s milk and dairy products are rich sources of vitamin B12 in human diet. Natural vitamin B12 present in cow’s milk is better absorbed than its synthetic substitute. The aim of this paper was to present the aspects connected with vitamin B12 in dairy cow nutrition.