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Zinc supplementation studies in the elderly have shown decreased incidence of infections, decreased oxidative stress, and decreased generation of inflammatory cytokines. Decreased incidences of blindness in patients with AMD and increased atheroprotective effect have been observed in the zinc supplemented elderly.
http://www.sciencedirect.com/science/article/pii/S0946672X14001503
Courtesy: Prasad et al., 2014