A 2025 human pilot study reported no adverse cardiac, hepatic, or renal effects at IV doses of 10-20mg
It is a key supplement for people suffering from pernicious anemia, and for vegetarians and vegans that have vitamin B12 deficiencies related to dietary choices
It's essential for: Brain and nerve cells Production of DNA Production of red blood cells Vitamin B12 Deficiency affects more than 20% of the elderly population If you have B12 deficiency, your doctor may suggest that you eat Let's look at the situations where deductibles, coinsurance, or copayments
Levels will plateau hopefully soon and you will pick up again
Patients with vitamin B12 deficiency and concurrent renal or hepatic disease may require increased doses or more frequent administration of methylcobalamin
However, this typically only occurs if the greying was specifically caused by B12 deficiency