it depends on what mental or non-mental disorders or diseases you have but if it's a normal person the answer would be....
Vitamin C! Duh!
Magnesium is a chemical element, not a vitamin; it is very important for the life.
The main vitamin in retinol is vitamin A. Vitamin A is important in a persons life as it helps with eyesight as well it is necessary in order for a fetus to develop. Creams containing retinol are used to treat persons with acne.
Erikson
is ontrol and coordination important than cognitive stage of learning because thay ar important in our life
zygote
You do not use it consciously, but your body uses it (from sunlight) to generate vitamin D.
In real life, all vitamins are equally important to receive in a balanced manner. On Howrse, I'm told the answer is Vitamin A
Lead is not a vitamin.
The most important years of your life are all of them. Every year brings something new and special. Every year of your life should be lived to the fullest.
Management of every organization has to play an integral role during every stage of organizational life cycle. Organization has to undertsand where they are standing by scanning their life cycle.
every subject is important
mother is important in every life of a child thats why