This important nutrient has numerous functions, many of which are not as well-known as others. For example, this nutrient serves as an anti-stress antioxidant that is vital for adrenal function. In fact, this nutrient is more highly concentrated in the adrenal cortex than in any other organ. This nutrient is also essential for the manufacturing of collagen, helping to improve vascular disorders by strengthening the collagen structures of the blood vessels to prevent hemorrhaging and easy bruising. Research indicates that a majority of patients with heart disease exhibit very low blood levels of this nutrient. In addtion, this nutrient is necessary for bone maintenance, especially since collagen forms the structural framework of bones. Recent research indicates that this nutrient helps improve the maintenance of bone mineral density in postmenopausal women. What is the name of this nutrient?