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Your brain is 60% fat — here’s why what you eat matters more than you think.
May 14, 2026
Let’s be honest — most of us don’t think much about brain health until something feels off. Maybe you’ve been blanking on names, struggling to stay focused through a long afternoon, or just feeling a bit slower than usual. It’s easy to chalk it up to stress or poor sleep. But more often than people realize, what’s happening in your head starts with what’s on your plate.
The science on diet and brain health has matured a lot over the past decade. We now know that certain foods can genuinely protect your memory, sharpen your focus, and reduce your long-term risk of conditions like dementia — and that other foods quietly work against you. The good news? The most powerful brain-protective food is also one of the most practical: fatty fish.
Here’s a real look at which foods your brain actually needs — and why fish deserves a regular spot on your plate, not just an occasional one.
The brain is a hungry organ. It accounts for just 2% of your body weight, but it burns through roughly 20–23% of your total daily energy.1 It’s constantly building new connections, clearing waste, regulating your hormones, and keeping every other system in your body running. All of that requires the right raw materials — and those come from food.
Here’s something that surprises most people: about 60% of your brain is made of fat.2
A significant portion of that fat is made up of omega-3 fatty acids — the same ones found in fatty fish. So in a very literal sense, the fats you eat become part of your brain’s physical structure. Feed it the right ones and it functions better. Feed it the wrong ones and it struggles.
Research suggests that eating a brain-protective diet may reduce the risk of cognitive decline by as much as 45%.3 That’s a meaningful number — and it’s largely within your control.
What you eat fuels every thought,
memory, and decision you make.
Here's why the right nutrients
matter so much.
DHA supports the structure of brain cells and synapses.
Omega-3s support how your brain cells communicate and build new connections.
A brain-protective diet may reduce the risk of cognitive decline by as much as 45%.3
¹ Raichle & Gusnard, PNAS 2002 • ² Chang et al., Acta Neurol Taiwanica 2009 • ³ Dighriri et al., Cureus 2022
¹ Raichle & Gusnard, PNAS 2002
• ² Chang et al., Acta Neurol Taiwanica 2009
• ³ Dighriri et al., Cureus 2022
A brain-healthy diet isn’t complicated or expensive. It’s mostly about eating more of the right whole foods — the ones that have been shown, again and again, to support how your brain ages and performs.
And for many people, it’s not just about their own brain health — it’s about supporting the focus, development, and long-term well-being of the people they care about, too.
Of all the foods studied for cognitive health, fatty fish — specifically the omega-3s it contains — has the most consistent, long-term evidence behind it. Here’s what’s actually going on.
There are two omega-3s that matter most for brain health: DHA (docosahexaenoic acid) and EPA (eicosapentaenoic acid). DHA is found in high concentrations in the neurons and synapses of your brain.6 It plays a direct role in how well your brain cells communicate with each other and how effectively your brain builds new connections.
The catch — and it’s an important one — is that your body can’t produce meaningful amounts of DHA on its own.7 You have to get it from food. Plant-based omega-3 sources like flaxseed and walnuts contain ALA, which the body converts to DHA very inefficiently. Fatty fish is still the most reliable way to get what your brain actually needs.
The FDA and EPA recommend at least 8 ounces of seafood per week — roughly two to three servings.11 Harvard’s nutrition team specifically recommends cold-water, darker-fleshed fish like salmon, mackerel, herring, sardines, and tuna, since these are the richest sources of EPA and DHA.7
The NIH notes that the FDA has recognized omega-3s with a qualified health claim related to reduced disease risk, and cautions against exceeding 2g of EPA and DHA daily from supplements without medical supervision.10 Getting your omega-3s from whole fish is generally considered the most effective and well-studied approach.
Fish is one of the best things you can eat for your brain — but mercury is a neurotoxin that accumulates in certain species and can damage the brain and nervous system, especially in developing children and during pregnancy.12
The FDA and EPA specifically advise avoiding high-mercury species like shark, swordfish, king mackerel, and tilefish — especially for pregnant women, nursing mothers, and young children.13 Even for healthy adults, eating high-mercury fish regularly isn’t a good idea.
This is the tension that most fish advice doesn’t resolve well: eat more fish, but worry about mercury. That’s exactly the challenge Safe Catch was designed to address.
Safe Catch is the only seafood brand that tests every individual tuna and salmon for mercury before it ever makes it into a can. Not batch testing, not random sampling — every single tuna and salmon. And every one has to meet Safe Catch’s strict mercury limit, which is:
That’s not just a marketing claim. It’s powered by Safe Catch’s own proprietary mercury-testing technology — independently validated by the AOAC Research Institute — that the company developed specifically to be able to test at this scale and precision. No other brand does this.
That’s also why Safe Catch is the official seafood partner of the American Pregnancy Association. For a brand to earn that trust, the standards have to be real.
Exceptional purity. Backed by
science.
Better for you and our
ocean.
We test every single tuna and salmon for mercury.
Because mercury levels should never be a guess.
Tested to strict mercury limits up to 10-25x lower than the FDA action level.
Backed by science. Independently validated
Just wild-caught tuna and salmon and a touch of sea salt.
No additives.
No preservatives.
No fillers.
No additives. No preservatives. No fillers.
Sustainably sourced tuna and salmon, committed to a healthy and thriving ocean.
Supporting the health of moms, babies, and future generations.
Clean protein. Pure nutrition.
Good for you and the ocean too.
There’s something else worth knowing about Safe Catch that sets it apart from almost every other canned fish on the shelf: there’s nothing in the can except fish.
No water added. No broth. No fillers, no preservatives, no additives of any kind. Safe Catch uses only sashimi-grade tuna and salmon, and cooks it just once — slow-cooked right inside the sealed can. That single-cook process means the fish never touches the air before you open it, and all the natural juices, omega-3-rich fish oils, and nutrients stay right there in the can.
Which is exactly why the label says: Do Not Drain.
When you open a can of Safe Catch, those juices aren’t brine or added liquid — they’re the fish’s own natural oils and vitamins. Just mix everything together and eat it as is, toss it in a salad, wrap it up, or throw it in a bowl. You’re getting the full nutritional picture, not a drained-down version of it.
You don’t need a new meal plan or a complicated routine. A few small shifts can get you to two or three servings of fish per week without much effort:
Your brain is doing an enormous amount of work for you every single day. The least you can do is feed it well. And the research keeps pointing back to the same food: fatty fish, eaten regularly, with enough DHA and EPA to support how your brain functions and ages.
The challenge has always been the mercury question. Safe Catch answers it directly — by testing every individual tuna and salmon to strict mercury limits up to 10–25× lower than the FDA action level, and putting nothing in the can except pure fish.
So eat the fish. Don’t drain the can.
Start with one small shift this week — add a serving of high-quality tuna or salmon to your routine, and build from there.
And feel confident that you know exactly what you’re eating. Small choices, made consistently, add up to a longer and sharper life — and this is one of the easiest ones you can make.
All health and nutrition claims in this article are supported by peer-reviewed research and official government health guidance.