B12 shots deliver a concentrated amount of cobalamin, a water-soluble vitamin essential for red blood cell formation, neurological function, and DNA synthesis, as detailed in the NIH fact sheet on vitamin B12
A vitamin B12 deficiency can lead to megaloblastic anemia, a condition characterized by a low number of red blood cells that are larger than normal ( Megaloblastic anemia can cause a variety of symptoms and side effects, including ( shortness of breath headache heart palpitations fatigue poor balance memory loss That said, being low in vitamin B12 doesnt always lead to megaloblastic anemia, and many people may only experience mild symptoms like fatigue ( Furthermore, while a deficiency in vitamin B12 may not cause weight gain, it can decrease energy levels and contribute to fatigue, making it harder to stay active and manage your weight
Brain and nerve function
However, call your doctor if the soreness worsens or lasts more than 2-3 days
Hair growth cycles are slow a single hair takes months to grow
