Question

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

Answer 1

Vitamin K.

Explanation:

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.