Stop taking vitamin B12 supplements and seek medical attention immediately if you experience these symptoms
B12 injections supply vitamin B12 as methylcobalamin or cyanocobalamin, typically given intramuscularly into the deltoid, supporting red blood cell formation, myelin and nervous system health, and the metabolism of homocysteine, a process that can falter with vegan diets, malabsorption, or medications like metformin
B-vitamin status and bone mineral density and risk of lumbar osteoporosis in older females in the United States
This article is the independent work of the author and Pure Encapsulations was not involved in the decision to publish this research
PMID 18020969
When, in the past, monitoring of symptoms had been done poorly, there may be some people who do not need parenteral B12 supplementation