FREE BRAIN HEALTH GUIDE

3 Top Nutrients For Brain Health (Most Don’t Get Enough)

Discover the science-backed nutrients that fuel memory, focus and long-term brain health — explained simply in this free guide

30 trillion

gut bacteria shaped in part by fiber intake, increasingly linked to mood and cognition

8,000+

distinct polyphenol compounds found in plants, tied to neuroplasticity and dementia risk

~35%

of your brain's fat content is made up of omega-3 fatty acids

Half

most people get only about half the recommended daily fiber

THE SCIENCE

Your brain runs on what you eat. Some nutrients matter more than others.

Your gut microbiome, fed by dietary fiber, produces compounds that directly shape brain inflammation, mood, and memory. Polyphenols from colorful plant foods protect neurons from oxidative stress and support healthy blood flow. And omega-3 fatty acids make up roughly a third of your brain's fat content, serving as literal building blocks for the cells that let you think, focus, and remember. These aren't fringe nutrients — they're foundational, and most people fall short on all three.

This guide distills the research on all three nutrients into a simple, practical resource — so you know exactly what to eat and why it matters.

"Food is one of the most powerful, underused tools we have for protecting the brain. These three nutrients are where I'd start."

• Austin Perlmutter, MD

01

The Gut-Brain Connection

Why your gut microbiome may be the most overlooked lever for mood and memory.

02

Dietary Fiber, Deep Dive

The types of fiber that feed beneficial bacteria — and how much you actually need.

03

Polyphenols Explained

The plant compounds behind berries, cocoa, and coffee's brain-protective reputation.

04

Omega-3 Fatty Acids

EPA, DHA, and ALA — what each one does, and why the ratio matters.

05

Best Food Sources

A list of top sources of fiber, polyphenols, and omega-3s.

06

Ideas for meals

Considerations to include these top foods into your routine today

The Research, Explained

Plain-language findings on the gut microbiome, BDNF, and omega-3s — no jargon, just clarity.

Best Food Sources for Each

Real, everyday foods that deliver fiber, polyphenols, and omega-3s — no supplements required.

Context You Won't Find in a Blog Post

Why fiber type matters, which polyphenols count most, and why plant-based ALA isn't the same as fish-based omega-3s.

Austin Perlmutter, MD

Austin Perlmutter, MD is a physician, brain health researcher, New York Times bestselling author, and educator focused on helping people understand the science of brain health, nutrition, exercise, and behavior change. He is the co-author of Brain Wash with David Perlmutter, MD.

His work has been featured across major media and read by millions, with a focus on translating complex science into practical steps for a healthier brain.