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According to the available scientific data, research experiments in rodents have lasted up to 45 days, with most studies ranging between 11-45 days or four weeks on average [3, 4, 7]
The most commonly reported effects are mild injection site reactions (redness, minor swelling), occasional headaches during the first few days, and rare instances of mild fatigue
Difficulty concentrating, forgetfulness, or mental sluggishness
Press a clean gauze pad over the site if there is any bleeding, and apply a bandage if needed
A lack of sufficient B12 in the body can lower a persons metabolism and make it increasingly difficult to lose weight
Vitamin B12 injections may be administered in the arm or other regions with excess subcutaneous fatty tissues like the buttocks, thigh, or abdomen
