An entire apple got me up over 180 as did half a bag of In N Out fries with no ketchup, and I'm not diabetic. Glucose response is very personalized. One monitor for two weeks was enough to convince me I should follow a low carb/keto diet. The instant feedback of the CGM was very motivating.

Low carb has been amazing for me. I have much better energy and strangely enough my vision has improved. I know because I can read small type on my phone when I wake up without reading glasses. I almost never need my reading glasses since I started low carb/keto, and was using them daily prior to that.