@hawkeye10,
You really make yourself out to be a know-it-all, but i have no good reason to assume that you know much at all. You just like to contradict others, and provide no support for your claims.
Quote:Production of hydrogenated fats increased steadily until the 1960s as processed vegetable fats replaced animal fats in the US and other western countries. At first, the argument was a financial one due to lower costs; however, advocates also said that the unsaturated trans fats of margarine were healthier than the saturated fats of butter.
That's from the Wikipedia article, and they cite as their source Ascherio A, Stampfer MJ, Willett WC. "Trans fatty acids and coronary heart disease".
Earlier in the same article:
Quote:The fat industry found that hydrogenated fats provided some special features to margarines, which unlike butter, allowed margarine to be taken out of the refrigerator and immediately spread on a slice of bread. By some minor changes to the chemical composition of hydrogenated fat, they also found such hydrogenated fat provided superior baking properties compared to lard. Margarine made from hydrogenated soybean oil began to replace butterfat. Hydrogenated fat such as Crisco and Spry, sold in England, began to replace lard in the baking of bread, pies, cookies, and cakes in 1920
They cite as their source Fred A. Kummerow (2008).
Cholesterol Won't Kill You " But Trans Fat Could.
No mention of shelf-life at all, and certainly no claim that that were the principle reason for switching to trans fats.