WASHINGTON, Dec. 23 -- The U.S. Department of Health and Human Services Food and Drug Administration issued the following warning letter to Pinnacle Professional Research dba Pinnacle Peptides from the Center for Drug Evaluation and Research: * * * Recipient: Pinnacle Professional Research dba Pinnacle Peptides, 1001 N Elm Street, Suite 31, Greensboro, NC 27401, United States, service@pinnaclepeptides.com Issuing Office: Center for Drug Evaluation and Research (CDER), United States WARNING   more