Raised insulin levels are much more complicated than we once thought. You can get an insulin response from artificial sweeteners just swished in your mouth and spat out. Solution, eat real food when you can
https://www.ncbi.nlm.nih.gov/pubmed/18556090, "Cephalic phase insulin release in healthy humans after taste stimulation?". The abstract ends, "In conclusion, the current data suggest that the sweeteners sucrose and saccharin activate a CPIR even when applied to the oral cavity only." Just, Pau, Engel, Hummel 2008. Appetite. 2008 Nov;51(3):622-7. doi: 10.1016/j.appet.2008.04.271. Epub 2008 May 10.
I appreciate that you posted a comment instead of just downoting. The fucking ignorant downvoting prick squad is a key reason that I mostly gave up commenting here.
I don't right now, but from my times when competing, I used to read a lot of science based research on nutrition and there was a study that said swishing a carb rich liquid was enough to trigger it.
I think I first saw it referenced on an old edition of 'The Complete Guide to Sports Nutrition' by Anita Bean
What I meant was there is a possibility of it happening as a sweet taste (parent didn't mention sweeteners, just sweet taste) response since there is a similar response to carb rich drinks (study didn't mention the kind of carbs so no idea)