red urine after b12 injection Not all that is is blood: a curious case of chromaturia urine is red from b12

Therefore it is not uncommon to see vegetarians or vegans present with vitamin B12 deficiencies

Summary: True vitamin B12 overdose is exceptionally rare because it is water-soluble and excess amounts are excreted through urine rather than accumulating in body tissues

Protein aggregates can trigger immune reactions at the injection site or systemically

Compounded medications are not FDA-approved, and their safety and efficacy have not been independently verified by the FDA

Vitamin B12 is used for treating and preventing vitamin B12 deficiency, a condition in which vitamin B12 levels in the blood are too low

(June 2005)