For the potion used to access the Dream World, see Guam vial.

A Guam potion (unf) is an unfinished potion made via the Herblore skill. Players make it by using a guam leaf on a vial of water.

It can be used to make:

Potion Ingredient Herblore Level Herblore Experience
Attack potion Eye of newt 3 25

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