I had trouble with the link, too. I did a search on the site and brought up what I think was the same article about tyrosine you found, bob26. I'll try and copy the link to that, and see if it works. http://www.mdadvice.com/library/vita/vitamin60.html
Good thread, and important info for us. Thanks for the research.
Kim, thanks for your research, too! I'll thank you even more once I figure it out, I'm sure. I'm finding it a little bit dificult at the moment to wrap my 60+ year old brain around all of the scientific jargon. Why can't these scientists talk English?!?
Hugs,