Calcium Overload May Hurt Eyes

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An analysis of the diets of nearly 3,200 Americans, published in JAMA Ophthalmology, has found a link between taking too much calcium and the risk of developing age-related macular degeneration (AMD), a common cause of vision loss among older people. Although researchers didn't conclude that calcium causes the eye disease, they did find increased incidence of AMD in people who consumed more than 800 mg daily of calcium from food and supplements. Earlier research, at the University of Maryland, discovered that fatty protein deposits, which are known to block vision, develop around tiny deposits of calcium in the eye.