If you spend time on social media, you’ve probably seen alarming claims about seed oils (canola, soybean, corn, sunflower) being “toxic” or causing inflammation. Let’s look at what the evidence actually shows.
The Anti-Seed Oil Argument
Critics of seed oils argue that they’re high in omega-6 fatty acids, which are supposedly inflammatory. They point to the increase in seed oil consumption over the past century and link it to rising rates of chronic disease.
What the Evidence Actually Shows
The idea that omega-6 fats are inherently inflammatory isn’t well supported by human studies. Most research shows that replacing saturated fat with polyunsaturated fat (including omega-6s) improves cardiovascular health markers.
What Large Studies Actually Show
A recent analysis using data from the Framingham Offspring Study found that higher blood levels of omega-6 fatty acids (the main fat in seed oils) were inversely associated with several inflammatory markers. In other words, people with more omega-6s in their blood had less inflammation, not more.
Source: Lai et al., Nutrients, 2025 (Framingham Offspring Study data)
The Real Concern
The issue with seed oils isn’t the oils themselves—it’s what they’re typically found in: ultra-processed foods. When you eat fried fast food, packaged snacks, and commercial baked goods, you’re consuming seed oils alongside refined carbs, added sugars, and countless additives.
Key insight: Blaming seed oils for the health effects of ultra-processed food is like blaming the bread for what’s wrong with a fast-food burger.
So Why Do We Still Minimize Them?
Here’s the honest nuance: even though seed oils aren’t the toxins social media claims, we still keep them off this site — for reasons that have nothing to do with the omega-6 panic. They’re heavily refined, industrially extracted (often with chemical solvents and high heat), and they’re the signature ingredient of the ultra-processed foods we avoid. Choosing traditional fats is simply consistent with the whole-food standard the rest of the site follows. It’s a quality-and-tradition choice, not a fear-based one.
The Oils We Avoid
Consistent with the site’s whole-food standards, these heavily refined industrial oils don’t appear in our recipes:
Industrial Seed & Vegetable Oils
Canola oil, vegetable oil (usually soybean), soybean oil, corn oil, cottonseed oil, grapeseed oil, “vegetable oil blends”
Spreads & Substitutes
Margarine, butter substitutes, and “spreadable” butter products with seed oils blended in
Note the consistency with the rest of the site: we avoid these because they’re industrially refined and the backbone of ultra-processed food — not because a teaspoon of canola in a restaurant dish will harm you. Context and dose matter.
Choosing a Real Olive Oil
Olive oil is the workhorse fat of Mediterranean eating — but the olive oil aisle is also full of mislabeled and adulterated products. A little label literacy goes a long way.
Look For
“Extra virgin” (the least processed grade), a harvest or “best by” date, a dark glass bottle or tin, and a single country of origin when possible
Be Wary Of
“Light” or “pure” olive oil (these are refined, not lower in calories), clear plastic bottles, no harvest date, and suspiciously cheap “extra virgin” at large volume
Storing It Well
Keep it away from light and heat — a cupboard, not next to the stove. Olive oil degrades with light, air, and warmth, so buy a size you’ll use within a few months
The Evidence for Olive Oil
The PREDIMED trial—one of the largest and best-designed diet studies ever conducted—found that a Mediterranean diet supplemented with extra virgin olive oil reduced major cardiovascular events by approximately 30% compared to a reduced-fat control diet. The trial followed 7,447 participants at high cardiovascular risk.
Source: Estruch et al., New England Journal of Medicine, 2018
Our Practical Approach
Rather than obsessing over seed oils, we focus on using the right oils for the right purposes:
For Cold Uses (Dressings, Finishing)
Extra virgin olive oil – Rich in polyphenols and well-studied for heart health benefits
For Medium-Heat Cooking
Extra virgin olive oil, butter, or ghee – Olive oil is stable enough for most home cooking despite myths to the contrary
For High-Heat Cooking
Avocado oil, refined coconut oil, ghee – Higher smoke points for searing and deep frying
Neutral Oils When Needed
Avocado oil or light olive oil – When you need a neutral flavor (some baking, mayo)
The Smoke-Point Myth
You’ve probably heard that olive oil “can’t be used for cooking” because it has a low smoke point. This is largely a myth. Extra virgin olive oil is remarkably stable when heated, thanks to its antioxidants and predominantly monounsaturated fat, and it performs well for the vast majority of home cooking — sautéing, roasting, even shallow frying. Reserve the higher-smoke-point oils (avocado, refined coconut, ghee) for genuinely high-heat tasks like searing or deep frying.
Rule of thumb: if you’re cooking on a home stovetop or in a home oven, extra virgin olive oil is almost always fine. Smoke point matters most for restaurant-style high-heat frying, not everyday cooking.
A Word on Tropical Fats
Coconut oil and palm oil get debated too. Coconut oil is high in saturated fat, so it’s best used in moderation rather than as your default cooking fat — but as a real, minimally processed traditional fat, it fits the whole-food standard, especially virgin (unrefined) coconut oil for flavor or refined for higher-heat cooking. Sustainably sourced palm oil appears in some traditional cooking; the main concern with palm is environmental (deforestation) rather than nutritional, so look for responsibly sourced options if you use it.
The Bottom Line
We prefer olive oil, avocado oil, butter, and coconut oil not because seed oils are poison, but because these traditional fats taste better and have longer track records in human diets. If you’re cooking at home with whole ingredients, the specific oil you use matters far less than the overall quality of your diet.
Don’t stress about the occasional restaurant meal cooked in seed oil. Focus your energy on what you cook at home—that’s where you have control and where consistency matters most.