Vitam and D Is Very Important for the Health of Our Bones and Other Processes

Vitamond is very important for the health of our bones other processes. It's needed to turn on and off and be od caretaker in your immune cells that fight off infection. So i think understanding how our body processes on vitem an d helps us understand why we need to take supplementation. If you have bad kidney or bad liver, disease, for example, how come your body may not make the active vitem ind for your body's needs?