Table 6. 12-month prevalences for the use of legal and freely available substances.
| Physical enhancement only | 10.2% (N = 290) |
| Cognitive enhancement only | 1.9% (N = 55) |
| Both | 3.9% (N = 110) |
| None | 84.0% (N = 2396) |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.