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Funding This work was supported by grants from the National Natural Science Foundation of China (NSFC Numbers 81672800, 81603009, 81673020, 81802632, and 82173830), Natural Science Foundation of Shaanxi (2020JQ-445), and the Key Research and Development Program of Shaanxi Province (2021SF-207, 2021SF-223, and 2022ZDLSF05-19)
GHK-Cu (glycine-histidine-lysine-copper) is a tripeptide that occurs naturally in human plasma, with concentrations declining significantly after age 60
The Cost of a B Complex injection is 40
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