This is a good survey of seed oils, which have been in the news a lot recently. From Sheramy Tsai at The Epoch Times via zerohedge.com:
Every decade has a new food enemy. First, it was fat. Then, it was sugar. Now, seed oils are under fire—blamed for causing obesity and chronic disease.
They’re almost impossible to avoid. Seed oils are in everything—from salad dressings and fast food to protein bars and even baby formula. Critics claim they’re harmful, while supporters argue they’re safe, affordable, and even good for you.
However, the truth is more nuanced. The debate is often oversimplified. Even the term “seed oil” is misleading, lumping together oils that have been part of traditional diets for centuries with those created for large-scale food production.
At its core, the controversy isn’t just about whether seed oils are inherently good or bad—it’s about how they’re processed and consumed.
What Are Seed Oils, Really?
If you’ve been following health trends, you’ve probably heard claims that seed oils are toxic and should be avoided. What exactly are seed oils, and why do some people consider them harmful?
At their most basic, seed oils are extracted from seeds. This might seem harmless—after all, olive oil comes from olives, and coconut oil from coconuts.
But not all seed oils are the same. Some, like sesame and flaxseed oil, have been integral to traditional diets for centuries and are extracted through natural, cold-press methods that preserve their nutrients and antioxidants.
Others, however, are highly processed. Industrial seed oils—like soybean, corn, canola, sunflower, safflower, cottonseed, grapeseed, and rice bran—are mass-produced through high-heat extraction and chemical refining.
