What is the function of bile?

• A. Produces enzymes for fat digestion.
• B. Breaks down fats into fatty acids.
• C. Neutralizes stomach acid.
• D. Absorbs vitamins in the colon.

Answer: (B)

Bile’s job is to emulsify fats. It contains bile salts that coat large fat droplets and break them into many tiny droplets, vastly increasing the surface area available for fat-digesting enzymes. This emulsification doesn’t digest fats by itself; instead it enables pancreatic lipase to act more effectively, breaking triglycerides down into free fatty acids and monoglycerides that can be absorbed.

Bile does not produce enzymes—those come from the pancreas and intestinal lining. It also doesn’t neutralize stomach acid—that function is handled by bicarbonate and other secretions from the stomach and pancreas. And absorption of vitamins happens mostly in the small intestine, with fat-soluble vitamins requiring the fat digestion process and micelle formation for uptake, not in the colon.