When I was writing about Jones Soda Co. (NASDAQ:JSDA) and their announced switch to sugar instead of high fructose corn syrup as sweetener, I didn't read all the way to the end of the Wall Street Journal [subscription required] story. I should have, though, as it's really the big news.

PepsiCo, Inc. (NYSE:PEP) funded a study on high fructose corn syrup, which indicates that sugar and high fructose corn syrup have nearly the same effect on the body, and found no difference in the way the two substances contribute to weight gain. (The study is being written up for submission to a journal by researchers at UC Davis.) Pepsi is promoting this study heavily and said in response to Jones' move, "To say cane sugar is healthier than HFCS just isn't true. Marketing a myth for a competitive advantage is irresponsible and short-sighted."

But. But! Pepsi is working on some versions of its most popular sodas, including Sierra Mist and Pepsi itself, that contain sugar instead of high fructose corn syrup -- along with the removal of some preservatives and artificial colors. This news, reported by Beverage Digest magazine, seems at cross purposes with Pepsi's spokesman's claim.

If Pepsi is so sure high fructose corn syrup is safe -- and so interested in making sure consumers believe it -- why would it even dream of converting? Something tells me we haven't heard the end of Pepsi's evaluation of HFCS.