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P5P is essential for normal transsulfuration the methylation pathway that converts homocysteine to cysteine making it one of the most important cofactors in the methylation cycle.*

The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest

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Discovered in the 1970s, DSIP is found in cerebrospinal fluid (CSF) in the brain and plasma, and its key role lies in modulating sleep patterns

The "Cu" in GHK-Cu stands for copper, which means it's the copper-bound form of the GHK peptide