GNC products are not specifically approved by the Food and Drug Administration, or FDA, as they do not require pre-market approval like pharmaceutical drugs. The FDA does regulate dietary supplements but primarily focuses on ensuring that the products are safe and that they meet labeling requirements. This means that while GNC products are subject to dietary supplement regulations, the company is responsible for ensuring their own products are safe and accurately labeled before they are sold to consumers. It is important to look for third-party testing or certifications that may be available for specific products, as this can provide additional assurance of quality. For detailed information regarding specific products and their compliance, it is advisable to check the current web page of GNC.com, which may provide insights into testing and quality standards that the products adhere to.