HUMAN NUTRITION

Detailed explanation-1: -Menaquinones (MKn, n = prenyl units in sidechain) are bacterially produced forms of vitamin K produced by the gut microbiota and consumed in the diet.

Detailed explanation-2: -The major source of vitamin K is found in green plants. This form is called phylloquinone. Another form of vitamin K is made by bacteria living in the intestine. This form is called menaquinone.

Detailed explanation-3: -Your microbiota also work as vitamin-production plants. Bacteria in the gut synthesize vitamins, and those that they don’t use are excreted to benefit their host. In humans, gut bacteria secrete vitamin B12 and a less familiar micronutrient called vitamin K.