Lyophilized (unreconstituted) GHK-Cu powder stores much longer: Frozen at -20C: 18-24 months Refrigerated at 2-8C: 12-18 months Room temperature: 2-4 months maximum If you won't use a vial within 30 days of reconstitution, consider reconstituting smaller amounts more frequently rather than mixing everything at once
NHS approach to B12 deficiency: NICE Clinical Knowledge Summaries recommend investigating B12 deficiency in patients presenting with macrocytic anaemia, unexplained neurological symptoms, or risk factors including pernicious anaemia, gastrectomy, malabsorption disorders, metformin use, proton pump inhibitors, or nitrous oxide exposure
10.1016/s0014-2999(99)00486-0 54 KachlikD.BacaV.StinglJ
Ensure that the treatment course is completed
Cyanocobalamin - Medicinal forms | BNF - NICE
2021, ods.od.nih.gov/factsheets/VitaminC-HealthProfessional/