100,000,000 Guinea Pigs: Dangers in Everyday Foods, Drugs, and Cosmetics is a book written by Arthur Kallet and F. J. Schlink first released in 1933 by the Vanguard Press and manufactured in the United States of America.

The book goes on to state that the Pure Food and Drug Act of 1906 is not effective in arresting these trends, and real reform or consumer protection is obstructed by the powerful connections that offending corporations have with the government.

Prolonged exposure to low amounts of toxic substances, even at very mild concentrations, can potentially have serious negative health impacts that consumers are not made aware of.

Examples cited include beauty products, which in the first quarter of the 20th century were found to contain arsenic, lead and even radium, the health effects of which were not understood or known to consumers at the time.

The authors claim that advertising for these drugs is deliberately misleading and uses a variety of dishonest techniques from false testimonials to fake experts.

The book concludes with the statement that "Above all, let your voice be heard loudly and often, in protest against indifference, ignorance, and avarice responsible for the uncontrolled adulteration and misrepresentation of foods, drugs, and cosmetics.

Many people were shocked at the extent of food contamination and drug side-effects, and 100,000,000 Guinea Pigs, along with several other books of a similar nature, were published during a period when a new consumer movement emerged.