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Authors contributions GAA, JRI, and RGG participated in compiling data and elaborating the manuscript

If you are on these medications, the providers can assess your risk and recommend appropriate supplementation

For further guidance, see our article on Peptide Stability, Storage, and Handling in Research Settings

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Introduction Cluster of differentiation 38 (CD38) is a cell surface glycoprotein and multifunctional extracellular enzyme which is primarily a NAD + glycohydrolase and ADPR cyclase ( + ) hydrolase, most of the NAD + catalyzed by CD38 is converted to adenosine diphosphate-ribose (ADPR), and a few molecules are cyclized to form cADPR by ADPR cyclase ( + ( As a cell surface receptor, CD38 is necessary for immune cell activation and proliferation