The people who run into trouble are those who started closer to the lower end of normal, around 200-300 pg/mL, where even a modest decline pushes them into deficiency
Vitamin B12 injections are generally safe, but some people may experience side effects, such as pain, redness, or swelling at the injection site, mild headaches, dizziness, nausea, or itching
B12 is a water-soluble vitamin your body uses to: Make red blood cells (which carry oxygen to your tissues) Keep your nervous system functioning properly Help your body turn food into usable energy Your body can't make B12 on its own you get it from animal-based foods (meat, eggs, dairy) or supplements
Bacteria that may have entered the vial now have an ideal environmentroom temperatureto multiply
For research with steady consumption, this works in your favor
For example, if you are looking to improve your energy levels, your we may recommend a shot that includes B vitamins