You may have heard of seed oils, but do you know why you shouldn’t use them? Most people think of cooking oils as a healthy addition to their diet. But what you may not know is that some cooking oils can actually be very detrimental to your health. In vitro studies, animal studies, human clinical trials, and observational studies show that industrial seed oils are highly reactive and unstable. They contain inflammatory linoleic acid, which is associated with heart disease, cancer, dementia, and other health problems. We now have hundreds of studies and papers examining cells, animals, and humans, consisting of tens of thousands of research subjects, providing very clear evidence that seed oils and linoleic acid, on the level they are consumed with seed oils, can be toxic and unsafe.
Seed oils are oils extracted from the seeds of various plants, such as soybeans, sunflower seeds, corn, canola, and safflower. Due to their relatively low cost and high smoke points, these oils are commonly used in cooking and food processing. The terms “vegetable oil” and “seed oil” are often used interchangeably but actually have different meanings.
Vegetable oils are any oils or fats derived from crops, including fruits, grains, nuts, and seeds. But when you see a bottle of oil labeled “vegetable oil,” it’s almost always
soybean oil.
Seed oils are a particular category of vegetable oils derived from seedsand are typically
higher in linoleic acid, and therefore, may be worse for your health. These oils are almost
always derived from the seeds of crops and include: Corn or Canola.
It is interesting to note that when seed oils were invented, there was no meaningful health regulation. They became popular based on flawed research suggesting they were heart-healthy. The modern FDA wasn’t established until the passage of the Federal Food, Drug, and Cosmetic Act of 1938. Not that the FDA actually helps us be healthier… 🙂 Most, if not all, of the recent information we know about seed oils has only come to light in the past 10-15 years. Due to flawed and dishonest studies that left out the harm seed oils can cause.
Physician and biochemist Dr. Cate Shanahan originally coined the term “the hateful eight” to refer to these industrial seed oils. The average consumption has increased 20 times in the past hundred years, which correlates to increased rates of obesity, cancer, and heart disease.




Linoleic acid and omega-6 polyunsaturated fats (PUFAs) are essential in your diet but only around 1-2% of your total daily calorie intake. You don’t have to eat industrial seed oils to meet your dietary requirements. Also, by eliminating them, you’ll avoid oxidized linoleic acid and other harmful, inflammatory byproducts associated with many health problemsAll seed oils are high in polyunsaturated fatty acids (PUFAs) that can cause inflammation and toxin accumulation in the body and when exposed to high heat or reheated multiple times, these oils can turn toxic and cause great harm to the human body. Current data suggest that “toxic” is an appropriate word to describe high linoleic seed oils, especially when heated, and especially in the amounts most people consume them today — an increase from 1-2% of to 6-10% or higher over the last hundred years.