Why Seed Oils Harm Your Health + 5-Minute Homemade Mayo Recipe

Learn why industrial seed oils fuel inflammation, weight gain, and chronic illness—and how to replace them with a 5-minute homemade avocado oil mayo. Includes real-food tips, ingredient history, and a simple stick-blender recipe.

If you’ve struggled with stubborn weight, chronic inflammation, low energy, brain fog, or mood swings from sugar crashes, please read this.

The Standard American Diet (SAD) didn’t fail us by accident. It’s built on ultra-processed foods designed for long shelf life, low cost, and repeat consumption — often filled with substances the human body does not recognize as food.

One of the biggest offenders hiding in plain sight?

Industrial seed oils.

First Things First: Empower Yourself at the Grocery Store

Before changing anything else, I recommend everyone download the free Yuka app.

Yuka allows you to:

• Scan barcodes while shopping

• See harmful additives, preservatives, dyes, and chemical fillers

• Learn what vague terms like “natural flavors” actually hide

• Get healthier alternatives instantly

Food labels are marketing — not truth.

Terms like “heart healthy” and “natural” are often sales language masking:

• Ultra-processed oils

• GMOs (such as maltodextrin)

• Additives banned in many other countries

Here’s a reality check worth sitting with:

Many major brands sell entirely different formulas in the U.S. than they do in the UK or Europe — because the FDA allows ingredients that are restricted or banned elsewhere.

That alone should raise questions.

Why Are Americans So Sick?

The U.S. leads the world in:

• Obesity

• Type 2 diabetes

• Autoimmune disease

• Chronic inflammation

Meanwhile, cultures eating mostly whole, minimally processed foods do not experience these conditions at the same scale.

This isn’t genetics.

It’s diet and food supply.

Seed Oils: From Industrial Use to “Food”

This part matters — and it’s rarely discussed.

Common seed oils include:

• Soybean oil

• Canola (rapeseed) oil

• Corn oil

• Sunflower oil

• Safflower oil

• Cottonseed oil

These oils were not traditionally consumed by humans. For most of history, people used animal fats, butter, tallow, olive oil, and coconut oil.

Many seed oils originated as industrial byproducts, and their large-scale refinement accelerated during the World War II era, when they were valued for properties useful in:

• Running machinery

• Lubricating industrial and military equipment

• Fuel and mechanical applications

They were cheap, abundant, and extremely shelf-stable — qualities that made sense for machines, not metabolism.

After the war, instead of shutting down production, these industrial oils were rebranded and redirected into the food supply. Marketing followed science loosely, labeling them modern, heart-healthy, and vegetable-based — despite the fact that they must be:

• Chemically extracted

• Heated to extreme temperatures

• Deodorized and refined to be palatable

Your body doesn’t recognize these oils as food.

So it responds accordingly.

👉 With inflammation.

Some estimates suggest the average American consumes hundreds of calories per day from seed oils alone — often unknowingly, through salad dressings, sauces, breads, snacks, and restaurant food.

A Note on Influencers, Supplements & Sales Pitches

You may hear similar discussions around lectins and seed oils from doctors like Dr. Steven Gundry. While I reference some overlapping ideas, I want to be very clear:

I do not buy his products.

I personally find the aggressive supplement upselling and sales funnels to be overkill.

Everything I share here came from changing food choices, not buying powders, pills, or programs. No specialty products were required. Real food did the work.

You don’t need expensive supplements to support your gut.

You need better ingredients and better information.

What Changed When I Removed Seed Oils

After removing seed oils and eating lectin-free for several months, I limited fats to:

• Raw, unrefined coconut oil

• Avocado oil

• High-quality cold-pressed Moroccan olive oil (rich in polyphenols)

The results were undeniable:

• Chronic inflammation subsided

• Energy stabilized

• Edema swelling in my ankle disappeared

• I no longer require two daily blood-pressure medications after 15 years

No gimmicks. No specialty foods. Just real ingredients.

Once you taste true cold-pressed olive oil with a good vinegar on leafy greens, you’ll understand — it’s next-level delicious.

Which brings me to mayonnaise.

Why Store-Bought Mayo Is a Problem

Most commercial mayonnaise — including well-known brands — is made with soybean or canola oil.

That alone makes it something I no longer consider food.

The solution is simple, affordable, and fast:

👉 Make your own mayo at home in about five minutes.

Easy 5-Minute Homemade Mayo

Stick Blender + Mason Jar Method

Once you make mayo this way, you’ll never go back.

Key Ratio (Important)

• 1–1½ eggs (room temperature) per 1 cup of oil

For a full large mason jar, we typically use:

• 3 eggs

• 1½–2 cups avocado oil

Room-temperature ingredients are essential for proper emulsification.

Ingredients

• 3 eggs, room temperature

• 1½–2 cups avocado oil

• Juice of 2 fresh limes

• 2 tablespoons apple cider vinegar (Bragg’s, with the mother)

• 2 teaspoons Dijon mustard

• ¼–½ teaspoon Himalayan salt, to taste

  
  

  (We find salt makes a big difference, even though some recipes skip it)

Equipment

• Immersion (stick) blender

• Wide-mouth glass mason jar

Instructions

1. Add eggs, lime juice, apple cider vinegar, Dijon, and salt to the mason jar.

2. Place the immersion blender at the bottom of the jar.

3. Begin blending and slowly pour in the avocado oil.

4. As the mayo thickens, gently lift the blender upward until fully combined.

5. Blend until thick, creamy, and smooth.

That’s it — real mayo in about five minutes.

Storage

• Store in a sealed glass jar in the refrigerator

• Keeps 2–3 weeks when chilled

The Bigger Picture

If more people cleaned up their diets:

• Big Food would lose customers

• Big Pharma would sell fewer prescriptions

Many modern diseases didn’t appear out of nowhere — they emerged alongside ultra-processed food, sugar addiction, and industrial oils repurposed as nutrition.

No one is coming to heal your gut for you.

But small, consistent changes — like removing seed oils and making your own staples — can create profound shifts in health.

Final Thoughts

Many of us were raised on sugary cereals, sodas, and processed snacks. That wasn’t nourishment — it was conditioning.

This isn’t about perfection.

It’s about awareness, choice, and empowerment.

Trust your body.

Trust your gut.

Try removing seed oils for a few months and see how you feel.

You may find that a simple jar of homemade mayo was the easiest — and most powerful — place to begin.