can u inject too much b12 Vitamin Deficiency: Causes, Symptoms, and Treatment How Often Should You Get
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PMID 25189324

When Oral Iron Causes Side Effects or Isnt Absorbed Well Iron tablets are the first treatment of choice, but theyre not suitable for everyone

Annals of Surgical Oncology 2011;18:37117

If it says 2000 iu / 2 mls, then take 1 ml to get 1000 iu
