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According to the bias assessment using the Cochrane Collaborations risk of bias tool, this study had a lower risk of bias
Although GHK-Cu and Pal-GHK have been of interest as effective peptides to be incorporated in the anti-wrinkle products, there is a surprising absence of clinical studies using them
Tritium-labeled Semax studies demonstrate peak brain concentrations within 30 minutes of intranasal administration, with detectable levels persisting in hippocampal and cortical tissue for 24+ hours (PMID: 16523722)
The duration of results depends on lifestyle, sun exposure, oxidative stress, and whether maintenance sessions are continued
Johansen, P
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