Injections are given intramuscularly and should only be administered by trained clinicians to ensure safety and effectiveness
For example: Fatigue, unexplained weight loss, or abdominal pain may indicate liver disease or cancer Easy bruising, night sweats, or feeling full quickly (early satiety) may suggest a myeloproliferative disorder Swelling in the legs, reduced urine output, or persistent nausea may point to kidney disease In cases of very high B12 from injections (not oral supplements), some people have reported headache, nausea, diarrhea, facial flushing, or skin rash
Is vitamin B12 deficiency a risk factor for cardiovascular disease in vegetarians
Nasser Nasseri, MD
High-Risk Populations for B12 Deficiency Some groups are more likely to have vitamin B12 deficiency
Some medical conditions may also increase the risk of deficiency