long term side effects of b12 injections Vitamin What Does a B12 Shot

A maximum strength vitamin B12 supplement can provide 5,000 mcg of B12 per serving and is designed for adults with very low levels of vitamin B12 as determined by a healthcare professional

Viola D, Dona A, Caserta E, et al

The dual action creates a net negative fat balance: more fat is broken down, less new fat is formed (Ng et al., 2000)

Muscle aging and sarcopenia preserves quiescent muscle-stem-cell pool and ameliorates aged-muscle dysfunction in rodent studies of sarcopenia [3]

In life-threatening cases, 5,000,000mcg of B12 is given directly to the veins within a 15 minute window

[1] [12] For most people, doses up to 2 mg (2000 micrograms) daily are unlikely to cause harm according to NHS guidance, as B12 is water-soluble and excess is typically excreted in urine