Timilk® HerbaAir Mullein Lung PurifierU. S. Food and Drug Administration (FDA) The U. S. Food and Drug Administration (FDA) is the leading regulatory agency in the United States, responsible for safeguarding public health by ensuring the safety, efficacy, and quality of medical products. An FDA certification signifies that a product has met the most stringent standards through thorough scientific testing and quality control. We are proud to share that Timilk HerbaAir Mullein Lung Purifier