What federal agency is responsible for approving microdermabrasion equipment for licensed practitioners?

The correct answer is the Federal Food and Drug Administration (FDA). The FDA is tasked with overseeing the safety and effective use of medical devices and treatments, which includes equipment used in cosmetic procedures such as microdermabrasion. This agency evaluates and approves devices to ensure they meet necessary safety standards before they can be marketed and used by licensed practitioners.

In the context of microdermabrasion, the FDA's role is critical because it ensures that the equipment used in cosmetic and dermatological procedures is safe for both practitioners and patients. By regulating these devices, the FDA helps to mitigate risks that could potentially arise from improper use or malfunctioning equipment.

The other entities mentioned do not oversee the approval of cosmetic equipment. The Federal Bureau of Investigation, for example, is focused on law enforcement and national security, while the Occupational Safety and Health Administration is concerned with workplace safety regulations. The National Institutes of Health primarily conducts medical research and does not engage in the approval of medical devices.