Yep, many things make it through the barrier, especial solvents such as alcohol,
and things that mimic hormones, such as the other examples you give.  The
barrier does tend to do a fair job of keeping some stuff out like lead.

Marshall

JudytheK wrote:

> I have always wondered about the "truth" of the "blood-brain barrier"
> because of the obvious effects of, for example, alcohol, heroin, marijuana,
> cocaine, morphine. Oh, I could go on . . .
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]]
> Sent: Sunday, August 26, 2001 9:35 PM
> To: [email protected]
> Subject: Re: CS>Help with level 4 glioblastoma
>
> Part of the problem with brain cancer is the blood brain barrier.  According
> to the people who treated my husband for brain cancer (and yes, all
> treatment
> failed) the blood brain barrier kept many things including medicine from the
> brain and I imagine it would keep colloidial silver from it.  Intravenous
> c/s
> could be tried of course.  I hate for my first post to this list to be a
> downer, but brain cancer is very hard to treat because surgically you have
> to
> be sure not to create a vegetable of your patient and radiation doesn't
> always help.  The blood brain barrier keeps most chemo from reaching the
> brain.  I'm very sorry about your sister in law or indeed anyone with brain
> cancer.  My husband died at 58.  He was very healthy and full of life except
> for the cancer and probably would have lived to 85 without it.  Margaret
> Park
>
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