Buff Stuff is an elixir mentioned in Exile. It is sold at Slurps and Burps, a store in Mysterium, and formulated by the Dizznee family.
It aids in making a person larger and stronger, increasing their muscle mass, and is drunk by Dex Dizznee in Neverseen, when Sophie and her friends need disguises to go to the Council's announcement about the gnomes, who were at that time, protesting the Council hiding the drakostomes from them. Dex says the elixirs Kesler gave him are "boring," and he goes to get some others, among which is Buff Stuff.