Coming here to say that alongside my "trolls get bigger than humans when they're older" theory, I also posit that Trolls cannot become drunk or experience the high of caffeine like humans can, because their body reacts only to stimulants found in the sopor slime. I think Sopor and Faygo (at least the trolls' Faygo, it could be the same soda brand as on earth) have the same chemical properties, but that Faygo probably has a higher concentration of sugar than Sopor does, which is why it does "weird" things to them when they have too much of it. Much like how sometimes bees get "drunk" if they take too much nectar.

I also think that Trolls dislike "sweet" tasting things and that perhaps their aversion to sweet things in general is because they taste like things they aren't really supposed to eat. Like Sopor slime might taste sweet, and Faygo is obviously a sweet-tasting drink. I always assumed it was because it's similar to how some people don't like the taste of iron and thus can't eat steak bc it "tastes" like blood or whatever lol. My only other "proof" of this is circumstantial lol. On the meteor, all of the humans drink Coffee but it's bitter and none of them like it and they all comment on how it sucks, except for some of the trolls who seem to like it. And in the Epilogues, Karkat eats these chocolate beetle candies a few times and I assume it's like dark chocolate which is also bitter.

Anyways, these are just headcanons T_T there's no real proof but I like adding these details in my fics just bc