where is a vitamin b12 injection given Optimal Sites for Maximum Absorption and Benefits This Is How Long It

Side effects are: Red rash Increase skin acne Photosensitivity Bruising and bleeding at the injection site Vitamin D Vitamin D contributes to normal absorption/utilisation of calcium and phosphorus Contributes to normal blood calcium levels Contributes to the maintenance of normal bones Contributes to the maintenance of normal muscle function Contributes to the maintenance of normal teeth Contributes to the normal function of the immune system Has a role in the process of cell division Helps to reduce the risk of falling associated with postural instability and muscle weakness

They are commonly used to boost energy, support focus and mood, assist with stress management, enhance metabolism, and contribute to healthy skin, hair, and nails

And heres the part that actually cuts the other way

Brain damage in infancy and dietary vitamin B12 deficiency