Polyjuice Potion is the potion that transforms a drinker’s appearance in the Harry Potter book series.
The potion allows a person to assume the physical form of another human for a limited time, provided a sample of that person is added to the mixture. Hermione Granger prepares Polyjuice Potion in Harry Potter and the Chamber of Secrets so she, Harry, and Ron can investigate whether Draco Malfoy is connected with the Chamber.
The transformation does not transfer the other person’s memories or magical abilities, and the potion is difficult and time-consuming to brew. Hermione accidentally uses a cat hair rather than a human hair and begins transforming into a cat. In Harry Potter and the Deathly Hallows, members of the Order of the Phoenix use Polyjuice Potion to create multiple decoy Harrys. Amortentia creates powerful attraction, while Veritaserum compels truthful answers.