alcohol after vitamin b12 injection When Should You Get a B12 Injection? Adverse reactions to vitamin B12

Some patients experience intolerable GI side effects or cant use GLP-1 drugs due to medical contraindications

Rotate injection sites to prevent tissue damage and maintain optimal absorption

Digestive upset: Some patients report nausea, diarrhea, or stomach upset following injections

All mice received 2 days of 10 mL/kg body weight sterile saline subcutaneous injections before beginning the treatment phase to allow for acclimation to the handling and stress associated with injections

Unlike oral supplements that must be digested, B12 shots deliver the vitamin directly to the bloodstream, providing immediate energy

Peter Attia MD