菜籽油最初是二战期间用作蒸汽机的工业润滑剂。它之所以有效，是因为：在低温下仍保持液态- 不易在高温下分解- 实现了流畅的机械操作二战期间，海军机械对菜籽油的需求量巨大。加拿大专门种植数百万英亩的菜籽用于生产工业润滑油。1945年：战争结束。油菜籽大量过剩。不再需要用于船舶生产。问题：我们该如何处理数百万加仑的工业润滑油？有人提出了一个绝妙的想法：“如果我们直接告诉人们把它吃掉呢？”问题：菜籽油含有50%的芥酸，芥酸对人体有毒。动物研究表明，芥酸会导致心脏损伤。解决方案：通过选择性育种培育低芥酸品种。“Canola”=“加拿大低酸油菜籽油”。20世纪70年代：发起大规模营销活动。“油菜籽”听起来像工业产品，不如改叫“卡诺拉油菜”，听起来更亲切、天然、健康。“有益心脏健康！”“比黄油更好！”“饱和脂肪含量低！”20年内，菜籽油将无处不在。他们没有提到的是：仍然需要使用己烷进行化学萃取。仍然采用高温和化学方法进行高度提炼加热后仍会迅速氧化- 仍然富含ω-6炎症性脂肪酸你吃的其实是战后重新包装成食品的蒸汽机润滑油，因为战争结束后他们需要处理剩余物资。下次看到“有益心脏健康的菜籽油”时，请记住：你购买的是营销做得更好的工业润滑油。- 你的曾祖母用当地农场产的黄油和牛油做饭。- 你使用的烹饪用油是来自工业农业的化学提取、高温破坏、石油加工的机械油。进步。Rapeseed oil started out as an industrial lubricant for steam engines in WW2.It worked well because:- Stayed liquid in cold temperatures- Didn't break down easily under heat- Created smooth mechanical operationWorld War II: Massive demand for rapeseed oil in naval machinery. Canada grows millions of acres specifically for industrial lubricant production.1945: War ends. Massive rapeseed surplus. No longer needed for ships.Problem: What do we do with millions of gallons of industrial lubricant?Someone has a brilliant idea: "What if we just tell people to eat it?"Problem: Rapeseed oil contains 50% erucic acid, which is toxic to humans. Causes heart damage in animal studies.Solution: Selective breeding to create low-erucic-acid varieties. "Canola" = "Canadian Oil, Low Acid"1970s: Launch massive marketing campaign. Rapeseed sounds industrial. Call it "Canola" instead. Sounds friendly. Natural. Wholesome."Heart healthy!" "Better than butter!" "Low in saturated fat!"Within 20 years, Canola oil is in everything.What they don't mention:- Still requires chemical extraction using hexane - Still highly refined using heat and chemicals - Still oxidises rapidly when heated - Still high in omega-6 inflammatory fatty acidsYou're eating steam engine lubricant that was rebranded as food after the war ended and they needed something to do with the surplus.Next time you see "heart healthy Canola oil," remember:- You're buying industrial lubricant with better marketing.- Your great-grandmother cooked with butter and tallow from her local farm.- You cook with chemical-extracted, heat-damaged, petroleum-processed machinery oil from industrial agriculture.Progress.