2017 sales of dietary supplements in the United States reached $36 billion, with 66% of students at surveyed universities taking at least one supplement. Which statement about dietary supplements is true? The FDA is authorized to review the effectiveness of dietary supplements before they are marketed. The FDA puts practices in place to ensure products that are free of contamination. The FDA is responsible for reviewing the safety of supplements before they are marketed. Supplement companies are required to notify the FDA if their supplement contains a new dietary ingredient