 Image Number D935-1 |
Epidemiologist Martha Morris and biochemist Jacob Selhub examine graphical evidence of the interaction between vitamin B12 status and folate status in relation to cognitive test results.
Photo by Stephen Ausmus.
An official website of the United States government
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.