Final answer:
Structure/function claims on dietary supplement labels typically describe how a nutrient affects normal body function, which should not be confused with claims to diagnose, treat, cure, or prevent diseases, as these require FDA approval.
Step-by-step explanation:
Structure/function claims on the label of a dietary supplement are most likely to describe how a nutrient affects normal body function. Unlike drugs, which can claim to diagnose, treat, cure, or prevent diseases, dietary supplements are not permitted to make such claims without explicit FDA approval. Instead, they may suggest that a supplement contributes to maintaining the structure or function of the body, such as supporting immunity or improving bone health, but they must include a disclaimer that the product has not been evaluated by the FDA for the diagnosis, treatment, cure, or prevention of any disease. This approach falls within the realm of the functional foods concept, which targets optimal health and disease prevention through diet.