hospital bac water Bacteriostatic 101: Comprehensive Guide to Its Uses and Storage – SyringesNeedlesDepot Ideal for IV Uses of Bacteriostatic Water for

Use the wrong solvent or mishandle the right one and weeks of work can be compromised in seconds

Ensure the skin is fully dry before injection

For a healthy person eating meat, dairy or fortified plant foods, the NHS view is that you do not need B12 injections

I would definitely return and recommend

But if the body has genetic mutations then these conversions dont happen well at all and the effect is the body does not get the absorption or use of the nutrient

Further, NICE and the BNF says that if there are neurological symptoms present, then every other day injections are the recommended treatment, so all the points you make about B12 being stored and sufficient are not really relevant