Because the 0.9% benzyl alcohol keeps the solution sterile through repeated withdrawals, bac water for peptides is preferred over plain sterile water whenever a vial will be accessed more than once over its shelf life
Its copper delivery function is biologically significant because copper is a cofactor for lysyl oxidase (essential for collagen cross-linking), superoxide dismutase (antioxidant defense), and cytochrome c oxidase (mitochondrial energy production)
Of course, always aim for quality sources, cautious dosing, and doctor supervision
However, these are typically mild and temporary
If you have been diagnosed with a B12 deficiency, your healthcare provider may recommend either sublingual B12 supplements or B12 injections
This means someone might feel fine but already be passing the virus to others