The Canola Deception

It started as a poison

Rapeseed oil has been used for centuries — but not as food. It was an industrial lubricant, lamp fuel, and in manufacturing. Why? Because rapeseed naturally contains high levels of erucic acid, a fatty acid that's toxic to the heart in animal studies. It also contains glucosinolates, which are bitter-tasting compounds that cause thyroid problems in livestock. Nobody was eating this stuff.

The Canadian rebrand

In the 1970s, Canadian scientists selectively bred rapeseed varieties to reduce erucic acid and glucosinolate content. The result was a new cultivar with less than 2% erucic acid. They needed a name that didn't include the word "rape." The solution: "Canola" — short for "Canadian Oil, Low Acid." It's a marketing name, not a plant name. There is no canola plant. It's rapeseed, rebranded.

There is no canola plant. 'Canola' is a marketing name — short for 'Canadian Oil, Low Acid.' It's rapeseed, rebranded.

The health claims

The canola industry spent millions positioning its product as a healthy alternative to saturated fat. It's low in saturated fat, high in monounsaturated fat, and contains some omega-3s — all technically true. What they don't advertise: canola oil is extracted with hexane, is heavily processed through the same degumming-bleaching-deodorising pipeline as other seed oils, and the omega-3s (ALA) it contains are poorly converted by the body to the forms humans actually need (EPA and DHA).

In 2006, the FDA allowed canola oil to carry a qualified health claim for heart disease — a claim that was based largely on the displacement of saturated fat, not on canola's own merits. The fine print was full of qualifiers, but the headline was all the industry needed. Suddenly "heart-healthy canola oil" was everywhere — in restaurants, in "healthy" meal kits, and on every supermarket shelf.

The processing problem

Canola oil is one of the most heavily processed oils you can buy. The industrial process — solvent extraction, degumming, bleaching, deodorising — is identical to other seed oils. By the time it reaches your kitchen, it's been heated multiple times, treated with chemicals, and stripped of virtually everything except fat molecules. Some of those fat molecules have been transformed by the high-heat processing into trans fats — even in oils labelled "trans fat free" (labelling regulations allow anything under 0.5g per serving to be listed as zero).

What to use instead

If you want monounsaturated fat, use extra virgin olive oil — it's cold-pressed from olives with no chemicals involved. For high-heat cooking, use butter, ghee, tallow, or coconut oil — stable saturated fats that don't oxidise easily. These are the fats humans have cooked with for millennia. Canola oil was invented in the 1970s and required an entire industry to convince you it was safe to eat.