This is one of the most common symptoms
Site rotation: Move injection sites (abdomen, thighs, upper arms), keeping each at least 1 inch from the last to limit irritation [15]
Vitamin B12 (cobalamin) is an essential water-soluble nutrient that supports energy production, red-blood-cell formation, and neurological balance
As B12 is a water-soluble vitamin, it's generally considered safe (because any not used will be excreted via your urine), but even so you shouldn't take more than the recommended doses unless recommended to do so by your GP, as some studies have shown possible negative impacts of overdoing it
Trials conducted between 2001 and 2007 demonstrated statistically significant reductions in body fat, although the larger Phase IIb OPTIONS trial did not replicate these findings at sufficient magnitude for regulatory approval, and formal development was discontinued in 2007