self-administered vitamin b12 injections Best Injection Sites: Where to Inject B12 · PA Relief How To Self-Inject B12

Instead, intramuscular injections may be more suitable

For lower doses (100-200 mcg), 2.5 mL works well, giving you a 2 mg/mL concentration where 100 mcg is a clean 5 units

Whilst there are published reports showing levels above normal can cause acne, there are no data Im aware of to show whether or not there might be a subset of patients in whom normal serum levels can trigger acne or an acne-like rash, she says

This type of sterile water and is also non-pyrogenic that contains 0.9% benzyl alcohol, which acts as a bacteriostatic agent

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