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Margarine makers start with cheap. poor quality vegetable oils, such as corn, cottonseed, soybeans, safflower seeds and canola.
These oils have already turned rancid from being extracted from oil seeds using high temperature and high pressure. Rancid oils are loaded with free radicals that react easily with other molecules, causing cell damage, premature aging and a host of other problems.
What comes out of the partial hydrogenation process is a smelly, lumpy, grey grease.
To remove the lumps, emulsifiers – which are like soaps – are mixed in