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- Xref: sparky rec.food.cooking:23919 sci.chem:5567 sci.bio:4691
- Path: sparky!uunet!ulowell!news.bbn.com!noc.near.net!transfer.stratus.com!bigbootay.sw.stratus.com!det
- From: det@bigbootay.sw.stratus.com (David Toland)
- Newsgroups: rec.food.cooking,sci.chem,sci.bio
- Subject: Re: Left-handed sugar
- Date: 27 Dec 1992 16:31:44 GMT
- Organization: Stratus Computer, Software Engineering
- Lines: 22
- Message-ID: <1hklpgINNrub@transfer.stratus.com>
- References: <72321@cup.portal.com> <1992Dec25.224457.17424@siemens.com> <72463@cup.portal.com>
- NNTP-Posting-Host: bigbootay.sw.stratus.com
-
- In article <72463@cup.portal.com> mmm@cup.portal.com (Mark Robert Thorson) writes:
- >Please excuse the cross-posting into the sci newsgroups, but we've been
- >having a discussion in rec.food.cooking about the supposed existence
- >of left-handed sugars which are indigestible hence calorie-free.
- >I contend that if L-sugars were calorie-free, they probably wouldn't
- >be sweet, either. Can someone in the sci groups clarify this?
-
- Fructose (fruit sugar) is the levorotatory form of dextrose. It is
- both sweet and digestible. It is true that d- and l- forms of chems
- will react to form different products with other chiral (assymmetric)
- compounds, but the various sugars seem to be digestible nonetheless.
-
- I'm not a biochemist, just a (former) organic and electrochemist.
- Perhaps achiral reactions break down the sugars to achiral components,
- or perhaps there is more than one respiratory process involved. Could
- a biochemist out there clarify further?
-
- --
- --------------------------------------------------------------------------
- All opinions are MINE MINE MINE, and not necessarily anyone else's.
- det@phlan.sw.stratus.com | "Laddie, you'll be needin' something to wash
- | that doon with."
-