arm hurts after b12 injection why does my hurt pain arm after a shot? B12 Injections for Energy: Benefits – why does my arm hurt

How is a Butaphosphan + Vitamin B12 Injection used

or to cobalt

The discovery that NNMT expression is dramatically elevated in adipose tissue of obese humans and animal models, and that NNMT inhibition or knockdown prevents diet-induced obesity and improves metabolic health, has catalyzed intense research interest in NNMT as a therapeutic target for obesity, metabolic syndrome, and related conditions

Yes, and this is one of the most common reasons oral supplements stop working for people

They are generally not recommended during pregnancy or breastfeeding, for people with a known allergy to any component of the formulation, or for those with certain medical conditions