$100 billion Ingredient Making Your Food Toxic - vegetable oil

https://www.rooshv.com/vegetable-oils-are-toxic
Before seed oils came onto the scene, heart attacks were unheard of: cardiologists in the early 20th century never saw them, and any sudden heart failure leading to death was due to a congenital defect. Cancer was rare and so was obesity. Then the captains of industry found out that they could dump their waste onto the food supply through the magic of industrial chemistry—similar to how they dumped fluoride in the water supply—by offering payola to medical associations for a stamp of approval. They also dangled the prospect of future high-paying jobs to government workers as long as they approve their toxins as food. This video summarizes how we’ve been duped in the name of profits.
There are two main problems with seed oils. First, they rapidly oxidize, whether in the bottle or while cooking. They break down into primary oxidation products like peroxides, and dienes, and also secondary oxidation products of carbonyls, aldehydes, trienes, and isoprostanes. These byproducts are toxic and directly damage the body. The olive oil you buy in a store comes in a dark bottle to block out UV light and prevent oxidation. Vegetable oil, on the other hand, comes in a clear bottle because it’s already oxidized, so there is no use to spend an extra penny per bottle to prevent a process that degrades the product.
Second, seed oils that enter the body cause oxidation themselves, an indirect form of poisoning. Their unsaturated chemical composition allows them to easily react with proteins, organic molecules, and cell membranes to impair biological functioning and cause oxidative stress which leads to inflammation. This causes cellular damage that, over the long term, is suspected in heart disease, obesity, cancer, diabetes, blood clotting, malnourishment, thyroid dysfunction, and immunity defects. It turns out that polyunsaturated fat, which is heralded as heart-healthy, is most dangerous for the heart because of how readily it causes inflammation. (See the reading list below and embedded videos for evidence of all claims in this article.)
I suspect that many of the chronic health problems Americans face today, and which the pharmaceutical industry is only too happy to treat with expensive medicines, are caused by the consumption of vegetable oils, moreso than a sedentary lifestyle. If you have more time, and want the details on specifically why vegetable oils are so bad for the human body, I recommend this video: