In one of the most promising preclinical studies , Dihexa restored cognitive performance in a rat model of Alzheimers disease , outperforming donepezil (Aricept), a common Alzheimers drug
Neuropharmacology 60:5865 [DOI] [PMC free article] [PubMed] [Google Scholar] Rajagopal S, Ahn S, Rominger DH, Gowen-MacDonald W, Lam CM, Dewire SM, Violin JD, Lefkowitz RJ
Unopened lyophilized powder storage Lyophilized (freeze-dried) GHK-Cu powder: Most stable form Water removed = minimal degradation Longest shelf life achievable How vendors ship Typical: 50mg or 100mg vials Storage conditions and shelf life: Why freezer optimal: Lowest degradation rate Extends shelf life 2-4x Minimal oxidation Best for long-term storage Industry standard Refrigerator acceptable: Convenient daily access Still good shelf life (12-18 months) Fine for near-term use ( 4 months Any foul odor (rare but indicator) Testing potency (impossible at home): No home test for GHK-Cu potency Must trust storage conditions Vendor testing (if available) Err on side of caution When uncertain, discard and replace Reconstituted GHK-Cu solution shelf life After adding bacteriostatic water

Such alterations were also associated with inhibition of cytochrome c oxidase (CcOX) activity and microtubule network disassembly, which are considered hallmarks of nitric oxide (NO) toxicity, indicating that NO, rather than the depletion of GSH per se, is the primary mediator of cell damage
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doi: 10.1016/j.gendis.2014.07.005 114 ZhangYTanHDanielsJDZandkarimiFLiuHBrownLMet al