Question

In the large intestine, what produces vitamin k?

Answer 1

The gut flora (large intestines) produces large amounts of vitamin K for absorption into the blood.

Explanation:

Little is known about the absorption and transport of vitamin K in the large intestines. Although this source of vitamin K in general provides only a small part of the daily requirement, it makes a significant contribution when dietary intake is low.

Dietary vitamin K is absorbed chemically unchanged from the proximal intestine, after soulubilising into mixed micelles composed of bile salts and the products of pancreatic lipolysis. From there vitamin K is incorporated into chylomicrons, secreted into the lymphatic capillaries, transported to the liver and repackaged into very low density lipoprotein proteins. Vitamin K is also present in the brain, heart, pancreas and bone. In healthy adults this efficiency of absorption is about 80% .