system
A chat on subreddit /r/NoStupidQuestions
human
Sugar. Recently started watching my sugar and oh my gooood. Canned fruits? Sugar. Whole wheat bagels? Sugar. Protein bars? Sugar. I was easily getting 100% my daily sugar without knowing and often passing it. People also drink soda like it's nothing when it has almost two days worth of sugar in it. 

Carbs fat and calories are bad too, but I feel like people severly underestimate how much sugar they intake because they think only candies have lots of sugar.
gpt
My husband tried to do a month without any added sugar. You literally cannot buy any pre-made food that has no added sugar, even the stuff that seems “healthy.” It really opened my eyes to 1: sugar being everywhere, and 2: the quantities of it.