Final answer:
The serving sizes of dietary supplements are not standardized, and there are no restrictions on the amount of a nutrient that can be in one serving. The FDA regulates supplements as food and not pharmaceuticals.
Step-by-step explanation:
The serving sizes of dietary supplements are not standardized, and there are no restrictions on the amount of a nutrient that can be in one serving. The Food and Drug Administration (FDA) regulates supplements as food and not pharmaceuticals. While the FDA sets Good Manufacturing Standards for supplements, they do not require supplements to meet the standards for drugs.