I don't believe that aspartame is digested. I think that it passes through like sorbitol. Could be wrong. I do know that it does depend on the person if you come out of ketosis or not. Aspartame does turn into formaldehyde if it is heated high enough. I personally think that the stuff is shit.

it's citric acid that knocks people out of ketosis sometimes... you were referring to diet colas, right string bean? i should say that some argue that the body will neurally cause insulin to be released by the pancreas when aspartame has been ingested... but i haven't heard any diabetics complaining. it's a controversial idea.

personally, i avoid ingesting too much aspartame. look for products that contain splenda... and buy splenda for sweetening on your own.

i also recommend you stick to water as much as possible, though i enjoy the odd raspberry ice crystal light treat.