www.cancer.gov
The Web site of the National Cancer Institute. Enter the topic of the email in the "search" window. If there is any information on the topic, for example, a "new" cancer risk, you should find it there.

Cancer Information Service
Available at 1-800-4-CANCER (1-800-422-6237). You can call this free service of the National Cancer Institute to speak with an information specialist who will provide reliable cancer-related information.

PubMed
A Web site created and maintained by the National Library of Medicine. Check to see if there is information on the email topic listed in the biomedical articles.