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Research protocols must account for potential beneficial roles of some senescent cells in wound healing and immune responses, requiring careful consideration of administration timing and duration in experimental designs

For general wellness maintenance, oral precursors like NAC or GlyNAC supplementation can modestly support endogenous synthesis, but they are not equivalent to IV administration for therapeutic replenishment

Supplementary Information ESM 1 (download DOCX (DOCX 12077 kb) Rights and permissions About this article Cite this article Gao, YC., Wang, C., Zhang, CX

GHK-Cu is often prescribed at 200-600 mcg per day, also via subcutaneous injection