In today’s food environment, seed oils are everywhere — in salad dressings, crackers, restaurant meals, plant-based meats, granola bars, and even many products marketed as “healthy.” Most people consume them daily without realizing it.
As someone who believes deeply in food as medicine, I always come back to one simple question:
Is this food working for my body… or against it?
Let’s take a balanced, evidence-informed look at seed oils and why reducing them may support long-term health.
What Are Seed Oils?
Common seed oils include:
Canola oil
Soybean oil
Corn oil
Sunflower oil
Safflower oil
Cottonseed oil
Grapeseed oil
These oils are extracted from seeds using high heat and often chemical solvents like Hexane. After extraction, they are typically refined, bleached, and deodorized before being bottled or added to processed foods.
The level of processing matters — because it changes the structure and stability of the oil.
The Omega-6 Imbalance
Seed oils are high in omega-6 polyunsaturated fatty acids (PUFAs), especially linoleic acid.
Omega-6 fats are essential — we do need them. The issue is proportion and overconsumption.
Historically, humans consumed omega-6 and omega-3 fats in a much more balanced ratio (approximately 1:1 to 4:1). Today, the typical Western diet can reach ratios of 15:1 or higher.
An excessive imbalance may:
Promote pro-inflammatory pathways when not balanced with omega-3s
Increase oxidative stress
Influence metabolic signaling
Impact vascular and cellular health over time
Chronic, low-grade inflammation is a contributing factor in many modern conditions — including metabolic syndrome, cardiovascular disease, and autoimmune disorders.
In my work, I often describe inflammation as "heat" in the body. It doesn't always show up immediately, but it accumulates.
Heat Instability and Oxidation
Seed oils are rich in polyunsaturated fats, which are chemically unstable when exposed to:
Heat
Light
Air
When heated — especially repeatedly, as in restaurant fryers — they can oxidize and form compounds that may contribute to cellular stress.
Oxidized fats behave differently in the body than fresh, stable fats like Avocado. From a functional nutrition perspective, this oxidative burden can compound when exposure is frequent.
Highly Processed by Design
Unlike oils pressed from fruit (like olive or avocado), seed oils require multiple industrial steps to become shelf-stable and neutral in taste.
This refining process removes natural antioxidants and alters the oil’s original structure.
When I guide clients through Jumpstart 30, we emphasize whole foods in their natural state. The closer a food is to its original form, the more predictably the body recognizes and utilizes it.
Where Seed Oils Hide
Even if you don’t cook with them at home, you may be consuming them in:
Restaurant meals
Salad dressings
Crackers and chips
Protein bars
Granola
Non-dairy creamers
Roasted nuts
Plant-based meat alternatives
Packaged dips and spreads
Reading ingredient labels becomes empowering — not restrictive — but informed.
What Can You Use Instead?
Rather than focusing only on what to remove, I encourage people to focus on what to replace.
Health-supportive fat options include:
Extra virgin olive oil (for cold use and moderate heat)
Avocado oil (for higher heat cooking)
Whole-food fat sources, such as avocados, olives, nuts, and seeds, in their intact form
It’s important to distinguish: whole seeds are not the same as refined seed oils.
Flax, chia, sesame, and hemp seeds provide fiber, antioxidants, and balanced fats when consumed whole. The concern lies primarily in heavily refined, overconsumed industrial oils.
A Balanced Perspective
This is not about fear. It’s about frequency and load.
If your diet is rich in:
Leafy greens
Cruciferous vegetables (broccoli, cauliflower, cabbage, kale, Brussels sprouts, radish)
Beans and lentils
Whole grains
Fruits
Omega-3 sources (like flax, chia, and walnuts)
… your overall inflammatory burden is likely lower.
But if seed oils are present at nearly every meal, every day, reducing exposure may be a meaningful step toward improving metabolic and inflammatory balance.
The Bigger Picture
Fats become part of your cell membranes. They influence hormone signaling, inflammation pathways, and cellular communication.
Food truly is information.
When we reduce heavily processed seed oils and prioritize minimally processed, stable fats, we help lower inflammatory load and support energy, clarity, and long-term vitality.
Small shifts — changing your cooking oil, choosing whole-food fats, asking restaurants what oil they use — create powerful ripple effects over time.
Your body is always listening to what you feed it.
Make sure the message is nourishment, not inflammation.
To Health & Longevity,
Maria Hubscher