Seed Oils Explained — Why Canola, Sunflower, and Soybean Oil Are in Everything
Seed oils went from industrial lubricants to the most common ingredient in your kitchen in less than a century.
How industrial oils became food
Before the 1900s nobody cooked with canola oil, soybean oil, or sunflower oil. These oils require heavy industrial processing — chemical extraction with hexane, degumming, bleaching, and deodorizing — to become edible. They were originally used as machine lubricants.
Today these oils appear in nearly every packaged food product. They are cheap to produce and have a long shelf life.
What the research actually shows
Seed oils are extremely high in omega-6 fatty acids. The modern diet delivers a ratio of omega-6 to omega-3 that is roughly 20 to 1. The historical ratio was closer to 1 to 1. This imbalance has been linked to chronic inflammation.
When heated, seed oils oxidize easily and produce compounds like aldehydes and lipid peroxides associated with cellular damage.
Scan before you buy
Seed oils hide in products you would never expect — bread, crackers, hummus, salad dressing, and even health bars. Revealia flags them and shows you exactly which oils a product contains.
Stop guessing. Start scanning.
Download Revealia and see the real health score of every product in your kitchen.