sometimes i find that if i am in ketosis, i can "cheat" on starch food (i haven't tried pasta, but i have tried popcorn and potatoes) and i find that i will still be in ketosis if i am: 1. eating those foods with fat, and 2. eating protien and fat at next meal....now if i cheat with sugar, i am out of ketosis within hours.
probably different for different people. i have read a few studies that say sugar acts different then starch in the body, and i guess it would depend on the person....
consider me lucky, i can even "cheat" with beer (but i have to make sure i have plenty of protien food around for the next day!)
p.s. i am wondering why you get your ketostick in the mail?