Hi Ron:

Both of your responses have stimulated insight and questions for me, so I'm
grateful to you both.

Joan's response certainly highlights underlying reasons for standard
casein's ability to stimulate adverse reactions for humans. If I'm following
her citation correctly, it would seem the mutation of casein occured with
domestication of cattle? Now that goat milk proteins have been introduced,
I'm assuming they bear a casein content and wondering how it might differ
from that of the A2 cattle?

Please keep us informed as you explore the alternate explanations noted in
your response.

As for distinguishing sources of protein, you've hit another nail on the
head. My guess is casein available for supplementation is straight out of
the dairy industry - and worry that dairy industry may be located in China.
Supplement contamination remains problematic, especially as unethical
vendors add prohormones and anabolics to newly released products in order
for users to reap rapid, artificial benefits that sell a product -
unfortunately resulting in athletes failing urine tests due to testosterone
and/or norandrolone evidenced.

All things considered, it looks as if whey isolate is the supplement of
choice.

best,

Ken

On Tue, Dec 8, 2009 at 12:14 PM, Ron Hoggan <[log in to unmask]> wrote:

> Hi Joan,
> Thanks for the information and the link. I did some reading after your
> email arrived. Variations of BCM in human milk are also thought to reflect
> food allergies in mothers.
> There are some alternative explanation for these data that come immediately
> to mind, but I'll do some reading and try to "catch up" in this area.
>
> On a practical level, I'm not aware of casein powders that declare the
> breed of cattle from which the casein was extracted. Thus, if we can't
> distinguish the source of the milk what difference does it make whether some
> milk might not cause the problems I outlined?
> Best Wishes,
> Ron
>