Final answer:
The Food and Drug Administration (FDA) is the regulatory agency responsible for monitoring the safety of cosmetic products.
Step-by-step explanation:
The regulatory agency responsible for monitoring the safety of cosmetic products is the Food and Drug Administration (FDA). The FDA is a federal agency of the United States Department of Health and Human Services and is responsible for protecting and promoting public health through the regulation and supervision of various products, including cosmetics.
In the case of cosmetic products, the FDA primarily focuses on labeling and safety. While pre-market approval is not required for most cosmetics, color additives must be specifically FDA approved before use.