how to best inject b12 Treating Severe Vitamin Deficiency How To Self-Inject B12

The margin for error is smaller

Cyanocobalamin injection is commonly used for vitamin B12 deficiency related to pernicious anemia, dietary deficiency, gastrointestinal conditions, or surgeries that reduce absorption

A 2025 study in Biomolecules found that NNMT inhibitor treatment "reduces body weight, white adipose tissue mass, total cholesterol, and adipocyte size in obese mice." These changes suggest cardiovascular benefit beyond simple weight loss

For adults over 65, no dose adjustment is required, but careful monitoring for adverse effects is prudent as older adults often have multiple comorbidities and medications that increase complication risk