|"There are plenty of eye-witness accounts. Just because you're so narrow-minded you need to have everything shoved under your nose before you–"
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- "Let's try again. Potter, where would you look if I told you to find me a bezoar?...Harry didn't have the faintest idea what a bezoar was...A bezoar is a stone taken from the stomach of a goat and it will save you from most poisons."
- — Professor Severus Snape, pg 109-110[src]
A bezoar — as every first year Potions student learns — is a stonelike mass taken from the stomach of a goat, that acts as an antidote to most poisons, with Basilisk venom being one notable of those exceptions. This is the reason why bezoars are used in the preparation of the Antidote to Common Poisons. This object is usually made of hair, plant fibre, or similar indigestible matter that stays in the gut of an animal and forms a hard ball or "stone".
There is a small stock of bezoars in the Potions Classroom store cupboard, as well as at least two in the hospital wing. Severus Snape asks Harry Potter where to find a bezoar in Harry's first Potions class. Three years later, in a Potions exam, Harry forgets to add a bezoar to his potion, because he was thinking about asking Cho Chang to the Yule Ball which earns him bottom marks.
As a student at Hogwarts, the Half-Blood Prince wrote "Just shove a bezoar down their throats." across the list of antidotes in his copy of Advanced Potion-Making. During his sixth-year class about antidotes, Harry, who was unable to understand Golpalott's Third Law, fetched a bezoar from the cupboard and showed it to Professor Horace Slughorn as the answer to the poison he was supposed to be analysing. This gained Harry Slughorn's admiration and ten points to Gryffindor for "sheer cheek."
In 1991, a Bezoar was seen on a desk in the Potions Classroom. In 1994, a bezoar was lying on the road into Hogwarts as the carriages entered. Later that year, there was another Bezoar on the floor in the Potions Classroom.
Known UsersOn 1 March, 1997, Ron Weasley was poisoned when he drank some oak-matured mead that was intended for Professor Dumbledore. Harry, remembering the above mentioned incident in Potions class, quickly found the bezoar he had given Professor Slughorn and shoved it down Ron's throat, saving his life.
Bezoars are undigested clumps of matter that accumulate inside a digestive system, similar to a cat's hairballs. They are used in Chinese herbology, and are claimed to remove toxins from the body. The word "bezoar" may come from the Persian pâdzahr (پادزهر), which literally means "protection from poison."
- Harry Potter and the Philosopher's Stone (First mentioned)
- Harry Potter and the Philosopher's Stone (film) (Mentioned only)
- Harry Potter and the Philosopher's Stone (video game) (First appearance) (GBC version only)
- Harry Potter and the Goblet of Fire
- Harry Potter and the Half-Blood Prince
- Harry Potter and the Half-Blood Prince (film)
- Harry Potter and the Half-Blood Prince (video game)