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Harvard Health
Some recognized in vitro skin toxicity methods are unsuitable for all metal compounds
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Formula technology: The use of special formula technology, such as liposome encapsulation or microliposome encapsulation technology, can improve the stability and permeability of GHK-Cu, thereby enhancing its effect in the skin
Occasionally, some people notice mild, body-wide effects in the first day or so: Mild diarrhea or an upset stomach
Over-the-counter products or home remedies can cause side effects
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