One thing I think would help a lot would be some sort of short description of the effects of mysterious liquid, since right now it's practically impossible to determine if it has done anything to you or not. This could also be solved if there's some sort of stats screen for the character, but that could run counter to how the game works if the point is exactly that there's no visible stats.
For this specifically, I mean a short text whenever you consume it, so you can tell what it's done to you. The randomness is perfectly fine, but being able to know what it's done when you take it would be a good idea in my opinion, since right now it's hard to know exactly what it can do in the first place.