I don't normally consume soft drinks at all. I especially don't like diet sodas, they always seemed to upset my stomach or have a bad aftertaste, with one exception:

When I did drink sodas, I liked Mtn. Dew and once purchased a diet one by mistake, and did not even realize it was diet until after I had drank it. It was pretty good!

Tonight on my way home I stopped in to the corner market to see if they had the diet version at their soda fountain so I got a medium size and felt strange after I drank it, checked my BG and it was 192! The past few days my BG has been 110 - 130, (it has continued to improve), and has not gone over 140.

I know the guy at the store so I called him and asked him to check if someone goofed and hooked up regular where the diet was supposed to go, and he said it was marked diet, but would change it out anyway.

I have hot black coffee every morning, a high caffeine light roast, and my BG has not gone over 140. Any ideas on this?