The Department of Health and Human Services, specifically the National Institutes of Health (NIH), is seeking to negotiate a sole-source contract with Cambridge Isotope Laboratories, Inc. for the provision of 13C labeled L-Glutamine, which is essential for advancing brain metabolism research. The procurement requires chemicals that are 99% enriched with stable isotopes, accompanied by Certificates of Analysis, to support in vivo carbon-13 spectroscopy projects conducted by the National Institute of Mental Health (NIMH). This specialized chemical is critical for detecting low-abundance 13C molecules, thereby enhancing the accuracy of research outcomes. Interested parties may submit capability statements by the response deadline, although these will not be considered competitive proposals, and the contract period is set to begin in April 2025 for one year, with the possibility of two one-year extensions. For further inquiries, interested vendors can contact Joseph Kennedy at joseph.kennedy@nih.gov.