Zinc is crucial for immunity. Thirty days of suboptimal zinc intake can cause a 30% to 80% loss of immune defense. Studies show that zinc is important for natural killer (NK) cells to multiply and function. NK cells are the body’s first-line defense against certain types of cancer. Supplemental zinc has been shown to increase antibody response and T-cell counts. Zinc deficiency also causes the thymus to atrophy.
(Source: Life Extension magazine. February 2003)