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And as we keep mentioning, the bigger caution is simply how little human safety data exists
As an irreplaceable electron carrier, it allows laboratory researchers to deeply explore how individual cells convert nutrients into usable ATP energy
Injectable GHK-Cu is more powerful and cost-effective than topical, but topical serums (1-2% concentration) work well for facial skin when applied daily
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Sources: Prkacin et al., 2001 | Sikiric et al., 1993 Stomach Lining Protection: Chronic Cytoprotection A second Prkacin et al
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