> I consume multiple times more sugar than the average person, and I'm thin as a rail with a healthy metabolism.
The average American consumes around 125g of sugar per day [1, 2]. This is about 500 kcals. Multiple times that would mean most of your daily calories are coming from sugar, unless you are very physically active.
[1] https://www.sugar.org/diet/intake/
[2] https://www.thediabetescouncil.com/45-alarming-statistics-on...