I'm not saying it's useful to call sugar a poison, and I don't generally refer to it as one. I'm saying it fits the definitions I've seen of poison, and that makes it literally a poison.
> Besides, sugar is the primary fuel for your brain; without sugar, we don't exist. It's a funny sort of poison that is necessary for our existence.
Arsenic, along with several other low-dose poisons, is also necessary for our existence[0]. Do you disagree it's a poison?