And here is the FDA's view of the truth: "Supplements,Zinc. There is evidence on the importance of zinc for maintenance of the immune system, and adequate zinc levels are
important, especially in patients at high risk for serious infections, such as those with HIV or children with sickle-cell
disease. In such people, supplements may be helpful. The use of zinc supplements for otherwise healthy people with colds,
however, is uncertain. Some research indicates that zinc may help prevent the rhinovirus from attaching to nasal passage
membranes. One analysis of studies on the use of zinc supplements, however, found no significant effect on colds. In 1999,
the FDA charged the manufacturer of the zinc carbonate lozenges Cold-Eeze and Kids-Eeze Bubble-Gum with making
unsubstantiated claims about their benefits against colds, allergies, and pneumonia. Of some interest, however, is Zicam, a
nasal gel that contains zinc ions as the active ingredient. The zinc gel may be more effective than zinc lozenges or sprays
because the zinc resides within the nasal cavity long enough to interact with the virus. More studies are underway. It should
be noted, however, that no one with an adequate diet and a healthy immune system should take zinc for prevention. Some
research has suggested that taking zinc for long periods, even in moderate recommended doses, may actually weaken
immunity, reduce HDL (the so-called good cholesterol), and interfere with copper metabolism. In any case, zinc does not
seem to reduce fever or soothe muscle aches or scratchy throats. Side effects include nausea and a bad taste, and the
mineral may be toxic in large doses. More studies are needed.
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