Here are some recent articles discussing the usage and perceptions of dietary supplements among Americans:
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8 in 10 Americans Say They’re Taking Supplements. Do They Have Benefits?
The New York Times -
About 8 in 10 Americans take supplements, and many see them as important to their health
Pew Research Center -
America’s supplement habit: 80 percent of adults are taking at least one
WMAR 2 News Baltimore -
Pew survey: 8 in 10 U.S. adults take dietary supplements
qz.com -
Use of Dietary Supplements in the United States
American Academy of Audiology