I am depended on for nearly every process necessary for life. The body requires 16 types of me everyday from calcium to iron . I am?

You are referring to vitamins and minerals, which are essential nutrients that the body needs to function properly. These micronutrients play crucial roles in various bodily processes, including metabolism, immune function, and bone health. The body requires a variety of them, including calcium, iron, and many others, to maintain overall health and wellbeing.