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- From: dyer@spdcc.com (Steve Dyer)
- Newsgroups: sci.med.nutrition
- Subject: Re: Enrichment/nutrient replacement question
- Message-ID: <1992Dec30.212357.23845@spdcc.com>
- Date: 30 Dec 92 21:23:57 GMT
- References: <92364.123849LAURA@UCF1VM.BITNET> <1992Dec30.140417.5261@porthos.cc.bellcore.com>
- Organization: S.P. Dyer Computer Consulting, Cambridge MA
- Lines: 39
-
- In article <1992Dec30.140417.5261@porthos.cc.bellcore.com> jil@uts.uucp (Jamie Lubin) writes:
- >Finally, Bernie pointed out that there's
- >a difference between synthetic and natural vitamin E.
-
- No, he said that some synthetic vitamin Es contain stereoisomers of
- alpha-tocopherol. Not all do. In fact, there are many different
- vitamin Es found in nature. Alpha-tocopherol is just one of them, and
- the most potent: beta-, gamma- and delta- tocopherols also have
- vitamin E activity. You see these sold as "mixed tocopherols"; their
- potency is represented as International Units, which is a certain
- amount of d,l-alpha-tocopherol, but would be a different amount of mixed
- tocopherols or l-alpha-tocopherol. In any case, vitamin E activity is
- sufficiently diffuse that it doesn't matter much.
-
- >There are differences
- >in other vitamins too (e.g., vitamin C, as been shown thru chromatographic
- >techniques--E. Pfeiffer, M. Justa Smith, etc.)
-
- Vitamin C is a pure chemical. There is no difference between the vitamin C
- in a vitamin pill and that found in a lemon. At all. If you understand
- what is said in that paper, perhaps you could reproduce it. It's a pretty
- crazy claim--I wonder if you're not misrepresenting what's said there.
-
- >Basically, if you get a
- >vitamin from a natural source (natural food), there are accompanying factors,
- >enzymes, catalysts, etc. which enhance it. If you were to strip all of these
- >away, what you'd have left would probably only be comparable to the synthetic.
-
- Well, I think it's better (and less fuzzy) to say that foods are better
- sources of vitamins and other nutrients, all in all. "Enzymes" are not
- relevant to human nutrition, and "catalysts" is a vague and unscientific
- term in this context. Vitamins have been unfairly elevated in importance
- since they've been isolated from foods. I don't think that anyone reputable
- would claim that all nutritional co-factors have been accounted for and that
- a pure vitamin extract is preferable to eating whole foods.
-
- --
- Steve Dyer
- dyer@ursa-major.spdcc.com aka {ima,harvard,rayssd,linus,m2c}!spdcc!dyer
-