Zinc is a mineral that stimulates the activity of approximately 300 enzymes, which are substances that promote biochemical reactions in your body. These reactions are essential for the formation of superoxide dismutase, one of the body's most important free radical scavengers. Zinc also promotes immune function, taste sensitivity, protein and DNA synthesis, insulin production, reproductive organ development and sperm motility. Zinc also supports normal growth and development during pregnancy, childhood, and adolescence. Age-related declines in immune function are associated with zinc deficiency, and the elderly represent a group that is vulnerable to mild zinc deficiency. Certain aspects of immune function in the elderly have been found to improve with zinc supplementation. Chromium plays an important role in maintaining healthy blood sugar levels in those within normal levels when used as part of a healthy diet. Boron is an essential nutrient for optimal calcium metabolism and healthy bones and joints. Boron may affect human steroid hormone levels.Dietary boron intake may support a healthy prostate. Vanadyl sulfate is an effective form of the trace mineral vanadium. Research indicates vanadyl sulfate may improve tissue sensitivity and promote already healthy glucose metabolism for those within normal range. Individuals consuming over 50 mg of zinc daily and/or a high level of fructose are advised to supplement their diet with 2 mg copper several times per week. Copper is required by the body to convert iron into hemoglobin45 and is an essential constituent of many important body enzymes including a form of superoxide dismutase, a major cellular antioxidant.