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Those with B-12 deficiencies may experience brain fog, memory problems, or mood disturbances, which can be mitigated with regular injections

[1] Other rare side effects noted (mostly in older literature or high-dose use) include: polycythemia vera and peripheral vascular thrombosis in patients receiving repeated injections (though these associations are not well understood, they were listed in prior product literature as possible adverse events)

Vitamin B12 injections are when liquid B12 is injected into your body through a needle either under the skin or into a muscle

They usually last 30 minutes to an hour

Certain medicines