Troll Whisker

• Type: Potion Ingredient
• Source: Trolls
• Users: Potioneers, Apothecaries

While not described in the original novels, a Troll whisker is presumed to be a thick, coarse, and wiry hair harvested from the face of a Troll. Given the brutish and often unhygienic nature of Trolls, the whiskers are likely to be exceptionally tough and stiff.

A Troll whisker is a magical ingredient used in Potions. Its primary known use is as a component in the Wiggenweld Potion, a powerful healing draught that can mend minor injuries and awaken a person from a magically-induced sleep (video game). This suggests the whisker possesses restorative, strengthening, or invigorating magical properties.

The specific history of the discovery and first use of Troll whiskers in Potion-making is not documented in the main book series. It is an established ingredient within the wider wizarding world, particularly in the context of creating healing Potions, though its mention is exclusive to supplementary materials.

Troll whiskers do not play any direct role in the plot of the seven Harry Potter novels. Although Harry Potter, Ron Weasley, and Hermione Granger famously battled a Mountain Troll in their first year at Hogwarts, the creature's whiskers were not mentioned, harvested, or utilized. The ingredient's existence serves to flesh out the detailed world of Potions and magical components, but this lore is established outside of the primary narrative.

• The most prominent mention of Troll whiskers comes from the early Harry Potter video games. In both the Harry Potter and the Sorcerer's Stone and Harry Potter and the Chamber of Secrets video games, Troll whiskers are listed as a key ingredient for brewing the Wiggenweld Potion (video game).
• While not explicitly named as a Potion ingredient in the books, the Potions Classroom and the office of Severus Snape are described as having shelves lined with jars containing a vast array of “pickled animals” and “slimy things,” indicating a wide variety of unlisted ingredients that could plausibly include parts from magical creatures like Trolls.