Edited

The product actually marketed as "classic" coke comes in a red/golden can and is caffeine- and sugar- free. It has corn syrup instead. Is this the coke people have been using for the coke flush? I think some people may be having a confusion in terms and have probably been referring to regular coke as classic. I've yet to find confirmation anywhere in these posts. Would the flush be any different using regular rather than classic? And more intriguingly, what coke did Dr. Sutter had in mind when formulating the flush?