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- Newsgroups: sci.med.nutrition
- Path: sparky!uunet!walter!att-out!cbfsb!cbnewsf.cb.att.com!kja
- From: kja@cbnewsf.cb.att.com (krista.j.anderson)
- Subject: Re: trans- fatty acids
- Message-ID: <1992Nov16.204300.1307@cbfsb.cb.att.com>
- Sender: news@cbfsb.cb.att.com
- Organization: AT&T
- References: <1992Nov13.220050.16384@emr1.emr.ca> <BxoEI3.K0o@fc.sde.hp.com>
- Date: Mon, 16 Nov 1992 20:43:00 GMT
- Lines: 47
-
- In article <BxoEI3.K0o@fc.sde.hp.com>, fritz@fc.sde.hp.com (Gary Fritz) writes:
- > Hm. So if I understand Cathy right...
- >
- > - Unsaturated oils (which includes most? all? vegetable oils, including
- > such things as canola, olive etc. oils) should not be cooked. They
- > should only be used raw in salads &etc.
-
- No, it's ok to cook unsaturated oils if they are not raw. If they
- are raw, unprocessed oils, then they may contain more than just oil
- and may acquire an unpalatable taste with cooking. Or maybe
- cooking with raw oils would result in rapid oxidation of the oil?
- I'm not sure. I buy small bottles of canola oil and they seem to
- keep fine without refrigeration by the time I use them.
-
- In addition to making an unsaturated fat more saturated,
- hydrogenation often changes the shape of the fatty-acid
- molecule. Normally, the fatty acid has a folded, or cis,
- form. Hydrogenation can change this to an extended, or trans,
- form. The body does not create trans fatty acids, but there
- is little evidence of any harm from consuming trans fatty
- acids in quantities found in the American diet. [1,p.69]
-
- The same book also mentions that new evidence shows that
- hydrogenation of corn oil and other oils they don't specify,
- results in the saturated fatty acid, stearic acid. However,
- stearic acid does not inhibit removal of blood cholesterol the way
- some other saturated fatty acids do. The problem fatty acids are
- lauric, myristic and palmitic acids. [1]
-
- > - This means my theoretically-healthy habit of sauteeing in canola oil,
- > even if we ignore the erucic (sp) acid question, is actually not that
- > healthy. Instead I should sautee in clarified butter. (Oh DARN. :-)
-
- Personally, I'd find the canola oil preferable. Butter is 66%
- saturated fat. I see no reason not to cook with vegetable oils
- that are low in saturated fats.
-
- By the way, cold-water fish are mostly unsaturated fats because
- they need to stay liquid in the cold. They may also be cooked!
-
- Reference
- 1. Herber, Victor, _The Mount Sinai School of Medicine Complete
- Book of Nutrition_, NY: St. Martin's Press, 1990.
- --
- Krista Anderson
- krista@ihlpf.att.com or ihlpf!krista@att.att.com or att!ihlpf!krista
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