-----Original Message----- From: Paleolithic Eating Support List [mailto:[log in to unmask]]On Behalf Of Phosphor Sent: Saturday, March 03, 2001 9:00 PM To: [log in to unmask] Subject: Re: [P-F] Fw: Re: [P-F] butter was/ Some thoughts on the Paleo concept > I have asked some organic chemists about this, and they tell me > that heating alone does not produce trans fats. The process by > which these trans bonds are made is: unsaturated fats are heated > and hydrogen is bubbled through them under high pressure in the > presence of nickel as a catalyst. This doesn't happen in > cooking. frying does produce trans-fatty acids from cis-fatty acids. This is why cooking should be done with butter. Andrew This is false; The reason some researchers believe that high heat cooking produces trans-fats is because they tested the frying oil at fast food joints that didn't use trans-fat frying oil. The problem being the food that was being cooked was already PRECOOKED in trans-fats which then of course leaked into the frying oil. Voila high heat produces trans-fats. Also think of this, if high heat produced trans-fats why would corporations waste money on the expensive catalyst process? If you wan't to question this check out Dr Enig's book Know Your Fats. She has been a lipid biochemist for along time and has been against trans-fats in the food supply pretty much since getting into the science of lipids. If heating oils possibly produced trans-fats she would definitely be against it. Eric --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.231 / Virus Database: 112 - Release Date: 2/12/01