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GHK-Cu, when used as a topical research serum, is typically reconstituted in bacteriostatic water or saline at concentrations of 50200 mg/L for topical applications
Combined effect is plausibly greater
Insomnia is not listed as an adverse reaction in the MHRA Summary of Product Characteristics, though some patients report sleep disturbances
One possible alternative is medication that acts simultaneously on several receptors as so-called multifunctional agonists
This paper reviews animal and human studies highlighting the molecular mechanisms and hallmarks of aging that NAD+ boosters target to slow biological aging and support healthy longevity
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