Horklump juice is a substance extracted from Horklumps. It can be used in a range of healing potions, including the Wiggenweld Potion. One can purchase Horklump juice at one of the apothecaries in Diagon Alley.
Behind the scenes
- The fact that this juice is used in potions seems to contradict a line in Fantastic Beasts and Where to Find Them claiming that the Horklump has no discernible use. However, it is possible that Newton Scamander was merely unaware of Horklump juice's use in potions.
- Harry Potter and the Philosopher's Stone (video game) (First mentioned)
- Harry Potter and the Chamber of Secrets (video game) (Mentioned only)
- Harry Potter and the Chamber of Secrets (film) (First appearance)