How the Brain Pulls in Omega-3s: The MFSD2A Transporter Explained

This review looks at a specific protein called MFSD2A, which acts like a doorway that lets omega-3 fatty acids (specifically DHA) cross from the bloodstream into the brain. The brain cannot make DHA on its own, so it depends entirely on this transport system to get the omega-3s it needs from diet.

DHA doesn’t cross the blood-brain barrier in its free form. Instead, it travels attached to a molecule called lysophosphatidylcholine (LPC-DHA), and MFSD2A recognizes and pulls this combined molecule across the barrier using sodium as part of the transport process.

The authors summarize what scientists have learned from structural and computational studies about exactly how MFSD2A changes shape to grab, move, and release LPC-DHA and similar lysolipid molecules. This kind of detailed molecular mapping helps explain, at a basic biological level, how dietary omega-3s ultimately reach brain tissue.