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Formula: Concentration (mg/ml) = Powder amount (mg) Water volume (ml) Common scenarios: 50mg vial + 2.5ml water = 20mg/ml For 1mg dose: 1 20 = 0.05ml = 5 units on U-100 syringe For 2mg dose: 2 20 = 0.1ml = 10 units 50mg vial + 2ml water = 25mg/ml For 1mg dose: 1 25 = 0.04ml = 4 units For 2mg dose: 2 25 = 0.08ml = 8 units 100mg vial + 5ml water = 20mg/ml For 2mg dose: 2 20 = 0.1ml = 10 units For 3mg dose: 3 20 = 0.15ml = 15 units Use the peptide reconstitution calculator to verify your math before mixing

People with Absorption Issues Several conditions can impair B12 absorption: Pernicious anaemia An autoimmune condition thats the most common cause of severe B12 deficiency in the UK Crohns disease or coeliac disease Previous gastric surgery Including gastric bypass Chronic use of certain medications Including proton pump inhibitors (PPIs), metformin, and some anti-seizure medications Others at Risk Pregnant and breastfeeding women (who have increased B12 requirements) Heavy alcohol consumers Those with chronic inflammation affecting gut health People taking certain oral contraceptives B12 Deficiency in the UK: How Common Is It
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Most practitioners and longevity doctors do not use a multiomics lens
Every Vial Size at a Glance Across the six vial sizes sold most often, these are the standard reconstitution volumes