can b12 injections cause bleeding Pernicious Anaemia: When Your Body Can't Absorb Vitamin Properly Vitamin B12 and ulcerative colitis:

A premenopausal woman losing 2030 mg of iron per cycle has a much higher daily turnover than a postmenopausal woman or an adult man

How to Get a Vitamin B12 Shot If youre considering Vitamin B12 shots, its important to consult with a healthcare provider to determine if they are appropriate for you

[21] When treated with cyanocobalamin, patients with Leber's disease may develop serious optic atrophy, possibly leading to blindness, based on few case reports

This is where B12 benefits can come into play

More serious B12 deficiencies have the potential to impair heart and neurological function, leading to a wide range of serious symptoms, including but not limited to tinnitus, severe joint pain, memory problems, depression, anxiety, poor muscle function, ataxia and changes in reflexes