What is a key absorption difference between MCTs and long-chain triglycerides?

What is a key absorption difference between MCTs and long-chain triglycerides?

• A. MCTs absorbed directly into portal circulation bypassing lymphatics
• B. MCTs require bile salts for emulsification
• C. MCTs go through lymphatics first
• D. MCTs are not absorbed

Answer: (A)

The key idea is that fat absorption depends on chain length. Medium-chain triglycerides are shorter and more water-soluble, so after digestion they are absorbed directly into the enterocytes and enter the portal circulation as medium-chain fatty acids and monoclycerides. They travel to the liver without being packaged into chylomicrons and without passing through the lymphatic system. This contrasts with long-chain triglycerides, which require emulsification, re-esterification, and packaging into chylomicrons to enter the lymphatics before reaching systemic circulation. So the main difference is their transport route: MCTs go to the portal vein, bypassing lymphatics.

The key idea is that fat absorption depends on chain length. Medium-chain triglycerides are shorter and more water-soluble, so after digestion they are absorbed directly into the enterocytes and enter the portal circulation as medium-chain fatty acids and monoclycerides. They travel to the liver without being packaged into chylomicrons and without passing through the lymphatic system. This contrasts with long-chain triglycerides, which require emulsification, re-esterification, and packaging into chylomicrons to enter the lymphatics before reaching systemic circulation. So the main difference is their transport route: MCTs go to the portal vein, bypassing lymphatics.