What is allowed
Structure/function claims describe a nutrient’s role in normal body structure or function, and must carry the FDA disclaimer: "These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease."FDA: structure/function21 CFR 101.93
What the FTC adds
The FTC expects health claims to be supported by competent and reliable scientific evidence, and a practitioner’s recommendation carries the same burden as the label.FTC guidance 2022 If you are paid to recommend a product, that material connection has to be disclosed.FTC endorsement guides
General information for licensed practices, not legal or medical advice. Sources are linked in the text.