Question

Micelle formation is necessary for the intestinal absorption of:

• A. Glycerol
• B. Bile acids
• C. Vitamin B${}_{12}$
• D. Vitamin D

Answer 1

The correct option is D Vitamin D

Micelles provide a mechanism for solubilizing fat-soluble nutrients in the aqueous solution of the intestinal lumen. Because vitamin D is fat soluble, it is absorbed in the same way as other dietary lipids.

Glycerol is one product of lipid digestion that is water soluble and is not included in micelles. Although bile acids are a key ingredient of micelles, they are absorbed by a specific Na+ - dependent co-transporter in the ileum.

Vitamin B${}_{12}$ is water soluble and hence its absorption does not require micelles.