*the* village idiot "usual suspect" wrote in message
...
pearl wrote:
...
I wonder if they use a different extraction method for "PC 55".

Yeah, so do I. Not. Lecithin is lecithin.

“lecithin” differs from “phosphatidylcholine”, however.

'Supplements labeled as “lecithin” usually contain 10–20%
PC. Relatively pure PC supplements are generally labeled as
“phosphatidylcholine.” PC best duplicates supplements used
in medical research.
http://www.vitacost.com/science/hn/Supp/Lecithin.htm

'Impact of Cooking, Storage and Processing
How do cooking, storage & processing affect choline?
Although consistent information is not available on the effects
of cooking, storage, and processing on the choline content of
food, choline’s participation in cell membranes and in the fatty
portion of food renders it susceptible to alteration by oxygen
and heat. While maximizing choline content would not be a
good reason to choose raw egg yolk over cooked egg yolk
(too many safety risks are involved with raw egg yolk),
overcooking of foods high in choline would be a practice
worth avoiding to help preserve choline content. '
http://www.whfoods.com/genpage.php?t...trient&dbid=50

'Lecithin is a complex mixture of phospholipids and other materials.
They vary greatly in their physical form, from viscous semiliquids to
powders, depending upon their free fatty acid content. They are
almost odorless and will vary in color from brown to light yellow.
Lecithins are used as dispersing, emulsifying and stabilizing agents.
They will decompose at extreme pH, are hygroscopic and will
oxidize, darken and *decompose at high temperatures*. Lecithin
should be stored at room temperature protected from light.
Refrigeration may cause the material to separate.'
http://www.rx4u.com/lecithn.htm
*emphasis added.

Ipse dixit. That site offers no evidence to support such claims. It also flies
in the face of soy processing: lecithin results from a distillate process
followed by centrifuge- or steam-separation from soy oil. So it goes through at
least one stage in which sustained heat is absolutely required, and optionally a
second.

Lecithin is produced for many different usages, I'm talking
about quality phosphatidylcholine nutritional supplements.

BTW, I'm surprised you advocate the use of a soy byproduct.
When soy lecithin supplements were given throughout perinatal
development, they reduced activity in the cerebral cortex and "altered
synaptic characteristics in a manner consistent with disturbances in
neural function."
http://www.mercola.com/2000/sept/17/soy_brain.htm

- in non-human animals,

So?

So they are completely different species with different reactions to
various substances. And you call others pseudo-scientific quacks!

possibly in excess.

Excess according to what or whom?

According to a RAT's tolerance, ducky.

I'm not keen on soy products in general, but I think that many of
the problems discovered may have been due to contaminants.

The feminizing aspects of phytoestrogens are not contaminants.

Rat

Rats are not humans.

snip cruel time-wasting 'research'

All above lifted from:
http://www.cheapbodybuildingsuppleme...estrogen.shtml

Additionally, see:
http://www.t-mag.com/articles/185soy.html
http://www.bodybuilding.com/fun/satter6.htm