How Omega-3 and Omega-6 Fats Support Brain Function: A Research Review

This review paper looks at how two types of polyunsaturated fats—DHA (an omega-3 found in fish oil) and arachidonic acid (an omega-6)—are built into the structure of brain cells. These fats are stored in different types of phospholipids, which are the building blocks of cell membranes throughout the brain.

The researchers explain that when the brain needs these fats for various jobs, they are released from membrane phospholipids, either directly or after being broken down into smaller signaling molecules. These fats and their byproducts help brain cells communicate with each other, support the growth of new neurons, influence inflammation levels in the brain, and help brain cells take in and use glucose for energy.

The paper then connects these basic mechanisms to research on several brain-related conditions, including traumatic brain injury, multiple sclerosis, and neurodegenerative diseases. It gives particular attention to studies on depression, Alzheimer’s disease, and Parkinson’s disease, since these conditions are closely tied to memory, thinking skills, and brain inflammation—all areas where these fats appear to play a role.