From the individual perspective: the onus is on proving the new intervention is safe, rather than proving it is dangerous. Corporates employ PR and marketing to imply the inverse. Did your great great grandma cook with X is my personal filter.

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Thanks. I'm still on the journey. My grandma, a farmers's wife, used a margarine quite a lot for baking. They grew rapeseed but most of it probably wasn't used for cooking oil.