Rare side effects include allergic reactions, which require immediate medical attention
Mild, temporary redness or itchiness can occur, especially on sensitive skin
Journal of Nutritional Biochemistry, 24(3), 207213
Elderly Patient Protocols Elderly patients face unique challenges with vitamin B12 injections
Any discomfort typically subsides quickly
This vitamin is involved in forming DNA and red blood cells, as well as necessary for brain function, heart health, energy production, and more ( Its found naturally in many animal products and sometimes added to fortified foods ( Vegans, vegetarians, older adults, and people with digestive issues that can interfere with nutrient absorption may be at a higher risk of vitamin B12 deficiency and need to supplement ( summary Vitamin B12 is a water-soluble vitamin involved in several aspects of health, including DNA synthesis, red blood cell formation, and brain function