Research has shown approximately 40% oral bioavailability in animal studies
Each mL of sterile aqueous solution contains: Active Ingredient: Cyanocobalamin (B12)..........1000 mcg Inactive Ingredients: sodium chloride 0.22% w/v, ammonium sulfate 0.1% w/v, citric acid 0.01% w/v, sodium citrate 0.008% w/v, and benzyl alcohol 1.0% v/v (preservative)
B12 shots are generally safe as long as proper precautions are taken for the injections
Phan, J
After one trip to her my results were almost overnight and amazing
Vitamin B12 deficiency Having trouble absorbing vitamin B12 from food, lacking intrinsic factors (for example, as a result of pernicious anaemia), having gastrointestinal surgery, taking certain medications for an extended period of time (such as metformin or proton pump inhibitors), and nutritional deficiencies are all causes of vitamin B12 deficiency