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The disadvantage is significant
GHK-Cu is generally considered non-comedogenic, meaning it is unlikely to clog pores
Sweeney MD, Ayyadurai S, Zlokovic BV
Subcutaneous (SC) or intramuscular (IM) injections at lower doses (tens to low hundreds of milligrams) are emerging as practical alternatives for maintenance therapy and wellness applications [3] [11]
The isoelectric point is 4.65.1 , making it acidic and negatively charged at physiological pH
Due to serious side effects many cannot be taken long-term
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