If you're in a risk group reduced food intake on GLP-1s, plant-based diet, long-term metformin or PPI use, over 50 and fatigue is dragging you down, checking your B12 is one of the highest-ROI moves you can make
TB-500 Reconstitution Steps Draw 2.0 mL bacteriostatic water with a sterile syringe
Trends in Molecular Medicine
Punctured vials during travel: Vials in active multi-dose use require the same storage discipline during travel as at home: temperature control, light protection, and aseptic technique on every draw
Based on typical degradation rates, it might retain 85-90% potency
Imperato-McGinley J, Guerrero L, Gautier T, Peterson RE: Steroid 5-reductase deficiency in man: An inherited form of male pseudohermaphroditism.Sciences1994,186, 1213-1215 59