low potassium after b12 injections Injections: Who Should Get Them and How Long Do They Last? B12 Injections for Energy: Benefits

Other side effects that can occur include: Excessive sweat production Rapid weight gain Pain when breathing Shortness of breath when lying down Anxiety Increased or irregular heart rate Numbness, tingling or muscular weakness Increased thirst Urinary frequency B12 injections can also cause allergy symptoms immediately after administration, like difficulty breathing, a swollen throat, mouth, or swelling of the mouth, tongue or face

That is why the wellness marketing of B12 as an all-purpose energy or weight-loss boost is not supported by NHS or NICE guidance

Calhoun AH, Hutchinson S

The absence of GHR activation means no JAK-STAT signaling, no IGF-1 induction, no insulin resistance, and no growth-promoting effects