This document discusses quackery, which is the promotion of fraudulent or ignorant medical practices by unskilled individuals posing as doctors. Quackery often involves overpromoting unproven health claims for profit. Quacks award themselves fake qualifications and make nonspecific or outlandish claims about secret formulas or cures. The document identifies different types of quackery such as medical, nutrition, and device quackery. Quackery can endanger lives, cause physical and financial harm, and create anxiety and regret among the public.