By decreasing the amount of bacteria in the body, including the colon, antibiotics reduce the synthesis of which fat-soluble vitamin?

1 Answer
Jul 29, 2017

Vitamin K.


While antibiotic use reduces the synthesis of many vitamins and nutrients, the fat soluble vitamin that is depleted by antibiotic use is Vitamin K.

Vitamin K is available in different foods and a small amount is synthesised by bacteria in the gut.

The use of antibiotics can reduce these gut bacteria and, if insufficient dietary Vitamin K is ingested, result in deficiency of the vitamin.