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Skin improvements from GHK-Cu tend to develop more gradually, with noticeable changes in firmness and texture typically appearing around weeks 4 to 8
More serious, though rare, side effects can occur, such as symptoms of low potassium levels (muscle cramps, weakness, irregular heartbeat) or signs of an allergic reaction
The limitation shows up at higher doses
For example, some MIC B12 (Methionine, Inositol, Choline + B12) blends are more sensitive to temperature and should be refrigerated both before and after first use
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