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Impurities can sometimes accelerate degradation
NAD+ can be delivered as an in clinic IV infusion, as a subcutaneous injection, or through oral precursors such as NR or NMN
The funding for much of this work came from Washingtons low-interest Public Works Trust Fund
Topical vs Injectable Tolerability Topical GHK-Cu appears better tolerated than injectable forms, with topical side effects typically limited to mild redness, itching, or irritation at application site and rare copper uglies phenomenon (anecdotal accelerated skin aging appearance due to potential MMP upregulation, not well-studied)
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