Omega-3 fatty acids are known to support brain health. Here’s what the evidence says about the role they might play in ADHD...Consuming omega-3s is known to be important for brain health and functioning. “These fatty acids are an essential part of nerve cell membranes [the cells’ outer layer], assist in cell communication, and help regulate inflammation,” explains Eugene Arnold, MD, MEd, professor emeritus in the department of psychiatry and behavioral health at The Ohio State University College of Medicine in Columbus.