When you click on that link at my site it brings up the abstact, look to the right, you'll see a hyperlink "related articles", click on it and it will bring up over 200 other studies, not all will be directly related to what you are looking for so you'll have to wade through them. Also if you find any that are full text and related to what you are looking for then, open and read them then click on the pertinent links in the reference links, this should give you a good base of studies to make your own assumption. I also highly recommend reading all you can on human substrate metabolism.[b said:Quote[/b] (addy @ June 27 2005,2:43)]if there are any others, i'd love to see them.