|"Are you a wizard or not?"
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- "...in all the panic about You-Know-Who, odd things have been cropping up for sale everywhere, things that are supposed to guard against You-Know-Who and the Death Eaters. You can imagine the kind of thing... so-called protective potions that are really gravy with a bit of bubotuber pus added..."
- —Arthur Weasley explains about the fake protective potions.[src]
Fake protective potions were sold to people under the claim that the potions are to protect the drinker from dark magic, but in truth were usually nothing more than a scam, such as a mixture of Bubotuber pus and gravy. Following the return of Lord Voldemort, a vast market appeared for protective potions, most of which were fake and did nothing, if not inflicting harm to the drinkers. Small-time crooks like Mundungus Fletcher sold them to the frightened hordes, who apparently did not notice its unhelpful (if not harmful) ingredients.
- Harry Potter and the Half-Blood Prince (First mentioned)