[jvb]

"Since 2003, food manufacturers in the US label their products (following government regulations) as "0g" trans-fat, which effectively means less than 500 mg trans-fat per serving; however, no fat is entirely free of trans fats. For example, natural butterfat contains 2-5% trans-fatty acids (mainly trans-vaccenic acid, a variant of the normal vaccenic acid).[29] However, the naturally occurring trans-fatty acids rumenic acid and trans-vaccenic acid (trans-vaccenic acid is used by the human body to make rumenic acid[30][31]) show anticarcinogenic properties,[32] and thus appear, quite opposite to the artificially created trans-fatty acids."

Interessant at naturlig transfett ser ut til å forebygge hjerte/karsykdom - og altså har helt motsatt effekt av kunstig transfett.

Fra Wikipedia, riktignok:
http://en.wikipedia.org/wiki/Margarine
Mye gøy lesning, blant annet ble produsentene tvunget til å ha rosa farge i margarinen en periode for å gjøre det mindre attraktivt å spise - etter press fra melke-lobbyen hehe