This bill amends the Federal Food, Drug, and Cosmetic Act to establish new prohibited acts related to dietary supplements, aiming to enhance consumer protection and regulatory oversight. It specifically prohibits the introduction or delivery into interstate commerce of any product marketed as a dietary supplement that does not meet the statutory definition of a dietary supplement. This measure seeks to prevent mislabeled or non-compliant products from reaching consumers. Furthermore, the legislation makes it a prohibited act to introduce into commerce a dietary supplement that has been prepared, packed, or held with the assistance or direction of a person debarred under the Act. To strengthen enforcement, the bill expands existing import exclusion and seizure authorities, allowing the Food and Drug Administration to refuse entry to and seize products that violate these new provisions, ensuring greater accountability and safety within the dietary supplement market.