I once heard margarine is plastic.
My body thinks so.
Margarine is made from vegetable oil and water.
My mother always called it Oleo Margarine, or just Oleo. A liquid form of margarine was once used in low pressure hydraulic systems, such as oleo struts. Primarily during WW II, I think.
Canola oil might make it so. That stuff is nasty. Canada can keep it.
Margarine isn’t plastic, but it does contain all kinds of nasty trans fats. I only use butter. Generally speaking, natural is better.