mayo clinic vitamin b12 injections B 12 Cyanocobalamin Injection 1000MCG/mL 30 mL MDV Compounded Methylcobalamin (Vitamin B12) Injection,

increases muscle strength and endurance

You can see an example below: Subcutaneous needles are insulin syringes and the length of the need varies from 6mm to 12mm which is less than 1 cm

A B12 injection is a fast, focused way to top up that single nutrient, delivering it straight into the muscle where it is steadily absorbed and put to work

In other words, the 1 in 10 people getting worse after starting with the B12 shots may just be the result of one of the other coexisting illnesses getting worse

Follow-up lab tests may be recommended to monitor your levels

The recommended treatment for cobalamin deficiency is cobalamin supplementation