Formula Gruna is a mysterious and quite possibly nefarious elixir that can only be acquired in the third act of Baldur’s Gate 3. The elixir grants a lasting effect that has the potential to be a massive buff or a bit of a nerf to your party.
Depending on your composition, it’s important you understand these effects before deciding to drink it. Even then, a specific chain of events must take place for this potion to exist, and those events start in the first half of Act Two. Here’s what you need to know about Formula Gruna, its effects, and if you should drink it or not when presented with the opportunity to do so in BG3.