b12 injections over the counter Hydroxocobalamin (Vitamin B12): Uses, Alternatives, Side Effects & More weakness and lethargy Why Use It This injectable Vitamin B12 treats B12 deficiencies in animals Vitamin B-12 Injection, 1,000 mcg/mL

[15] [16] Tests may include full blood count, serum B12 levels, anti-intrinsic factor antibodies (to diagnose pernicious anaemia), and sometimes methylmalonic acid or homocysteine levels when the diagnosis is uncertain

Some formulations omit glycine entirely

Patients with known chronic conditions such as liver disease, kidney disease, or previous cancershould ensure their healthcare team is aware of elevated B12 results, as this may influence monitoring strategies or treatment decisions

Or, double-check the instructions and make sure you werent doing something wrong

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B12 helps form red blood cells, which are essential for delivering oxygen to muscles during physical activity