Final answer:
The Food and Drug Administration (FDA) is responsible for ensuring the safety of cosmetics in the US. They regulate cosmetics through the Center for Food Safety and Applied Nutrition, ensuring that ingredients are safe and products are accurately labeled.
Step-by-step explanation:
The agency in the US responsible for ensuring the safety of our nation's cosmetics, including makeup and skincare products, is the Food and Drug Administration (FDA). The FDA regulates cosmetics through the Center for Food Safety and Applied Nutrition. While cosmetic products are not subject to premarket approval, all color additives must be FDA approved. The FDA also regulates cosmetics labeling, and products that have not been safety tested must bear a warning.