Which vitamin requires bile salts for emulsification and integration into the micelle for intestinal absorption?

• A. A
• B. B1
• C. B12
• D. C

Answer: (A)

Bile salts emulsify dietary fat and form micelles that solubilize fat-soluble vitamins, allowing them to be absorbed by enterocytes. Vitamin A is fat-soluble, so its intestinal absorption depends on this micellar solubilization process. Without bile salts, fat and fat-soluble vitamins don’t efficiently integrate into micelles, reducing absorption.

In contrast, water-soluble vitamins like thiamine (B1) and vitamin C are absorbed by different mechanisms and do not rely on micelle formation. Vitamin B12 absorption requires intrinsic factor and specific ileal uptake, not micellar solubilization. Therefore, Vitamin A best fits the requirement of needing bile salts for emulsification and micelle incorporation for intestinal absorption.