The omega-6 imbalance in modern diets
Talk about omega-3 for long enough and someone brings up omega-6, usually as the bad guy. It's a tidy story, and it's mostly wrong. Omega-6 is an essential fat your body needs and can't make — you'd be in trouble without it. The real issue isn't the fat itself; it's how much of it we now eat, and how little omega-3 sits alongside. Understanding that distinction is the difference between a useful diet change and pointless fear of a whole food group.
Two fats, one family
Omega-3 and omega-6 are both polyunsaturated fats, and both are essential — meaning the body requires them from food. They're partly related in how they work: the body uses them to build signalling molecules, some of which lean toward inflammation and some away from it. For most of human history the two arrived in roughly comparable amounts, and the system stayed in a workable balance. That balance is what shifted.
What actually changed
The modern surge in omega-6 is not from a mysterious new food — it's mostly from refined vegetable and seed oils. Over the last century these oils became cheap, shelf-stable and ubiquitous: in fried food, packaged snacks, dressings, sauces, baked goods and most of what fills the middle aisles of a supermarket. They're heavy in omega-6. At the same time, omega-3-rich foods like oily fish didn't rise to match. The result is a plate that tilts hard toward omega-6, not because anyone chose it, but because that's what processed food is built on.
Why the balance matters
Because omega-3 and omega-6 feed into related pathways in the body, the amount of each helps shape the overall tone — including how the body manages inflammation, which has its own guide on this site. When omega-6 vastly outweighs omega-3, that tone tends to lean one way. Bringing them closer isn't about eliminating omega-6; it's about giving omega-3 enough presence to do its part of the job. Balance, not banishment, is the whole idea.
Nudging the ratio back
The good news is that you fix this from both ends, and neither is hard. On the omega-6 side, the lever is processed food: the more meals you build from whole ingredients, the less refined seed oil you take on without noticing. You don't have to hunt down every gram — cooking more at home does most of it automatically.
On the omega-3 side, it's the advice that runs through this whole blog: eat oily fish when you can, keep flax, chia and walnuts in rotation, and consider algae oil if you skip fish. You're not trying to crash omega-6 to zero — that would be both impossible and unwise. You're widening the omega-3 side of the scale until the two sit in better proportion.
The balance, in short
- Omega-6 is essential — the problem is the quantity, not the fat
- Main driver — refined seed oils in processed and fried food
- Fix from both ends — less ultra-processed food, more omega-3
- Skip the calculator — nudge the balance, don't chase a number
- Cooking at home — cuts hidden omega-6 without any tracking
A calmer way to think about it
It's easy to turn any nutrient into a hero or a villain, and omega-6 has been cast as both at different times. The steadier view is that it's simply one of two fats that are meant to work in proportion. Modern eating pushed that proportion out of shape, quietly, over decades. The correction is equally quiet: cook more real food, eat more omega-3, and let the balance drift back toward where it used to sit. No extremes required.