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.
Box and Whisker plot showing amount of cannabinoids detected in the hair of non‐users, light cannabis users and heavy cannabis users, where each cannabinoid is measured in ng/mg. Non‐users were not included in this plot as none of these individuals had any of the cannabinoids detected in their hair.
