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I've noticed that the vacuum packed "butcher block" rib eye steaks have 1 gram of trans fat. Why is that? Do all steaks have trans fat? I was really disturbed by seeing that. I'd like to eat this type of steak on a daily basis. Since this steak has 1 gram of trans fat would that be negligible or something to be concerned about?

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Thanks Nick. Good Q - I learned something here. – Crowlover Jul 9 at 3:25
I was alarmed too when I first saw this. But it's all "endogenous" trans fat, which is harmless from what I understand. – Mambo Jul 9 at 14:27

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CLA (edited: conjugated linoleic acid) is a trans fat that is found in grass-fed meat and butter. It is a good trans fat. Nothing to be worried about.

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This is good to hear, I will continue with the Trader Joe's Ribeye's, by the way they are an awesome value and damn tasty. – Nick Jul 11 at 2:04
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Some trans fats occur naturally in (edit: grass fed) beef and dairy. Not the same thing as artificial trans fats.

EDIT: More info here with several other links included: http://livinlavidalowcarb.com/blog/are-there-healthy-naturally-occurring-trans-fats-found-in-meat-yes/8178

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Are you absolutely sure about this??? I thought ALL trans Fats are artificial by definition..... Wow the things I learn on PaleoHacks. Amazing. Do you have a link for this? – Crowlover Jul 9 at 3:19
NOt according to Wikipedia – Crowlover Jul 9 at 3:21
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That's what the hoopla was all about when NYC decided to ban all trans fats in restaurants. It occurs naturally in butter. Bakers were freaking out. – MathGirl72 Jul 9 at 3:37
Oh...... well I better read the NYTimes more often! :) – Crowlover Jul 9 at 4:34
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Good lord, don't do that! – MathGirl72 Jul 9 at 12:31
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Ok somebody is screwed up here.

Wikipedia says this:
Trans fat is the common name for unsaturated fat with trans-isomer (E-isomer) fatty acid(s). Because the term refers to the configuration of a double carbon-carbon bond, trans fats are sometimes monounsaturated or polyunsaturated, but never saturated. *Trans fats do exist in nature but also occur during the processing of polyunsaturated fatty acids in food production.[1]* The distinction is important because trans fatty acids generated naturally by enzyme action are generally beneficial, whereas those generated by physical agents such as heat or pressure can lead to a variety of health problems.[2]

**what they are labeling as Trans fat is not actually a Trans fat as we know it rather a trans-unsaturated fats

The process of hydrogenation adds hydrogen atoms to unsaturated fats, eliminating double bonds and making them into partially or completely saturated fats. However, partial hydrogenation, if it is chemical rather than enzymatic, converts a part of cis-isomers into trans-unsaturated fats instead of hydrogenating them completely. Trans fats also occur naturally in a limited number of cases: Vaccenyl and conjugated linoleyl (CLA) containing trans fats occur naturally in trace amounts in meat and dairy products from ruminants, although the latter also constitutes a cis fat.

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Yes, there is a cis and a trans fat for CLA. The trans fat is the beneficial one. Loren Cordain discusses this in "The Paleo Diet". – MiMintzer Jul 9 at 3:36

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