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.
 Image Number K9562-1 |
In studies to evaluate the connection between leptin and hunger, nutritionist William Horn and chemist Nancy Keim designed questionnaires to help volunteers assess their hunger. Here, the researchers review the study data.
Photo by Peggy Greb.
