Oral zinc supplementation in Down's syndrome subjects decreased infections and normalized some humoral and cellular immune parameters.
A daily zinc pill lowered infection rates and fixed immune blood markers in children with Down syndrome.
01Research in Context
What this study did
Doctors gave children with Down syndrome a daily zinc pill for four months. They checked immune blood markers before and after. No control group was used.
What they found
After the four months, kids had fewer colds and other infections. Their immune numbers moved into the normal range.
How this fits with other research
Panpan et al. (2025) also found low zinc in kids, but their group had autism, not Down syndrome. They only measured blood levels and gave no pills.
de Moraes et al. (2013) and Lee et al. (2022) looked at teeth in Down syndrome, not immunity. They show the same diagnosis can have many health angles.
Brugnaro et al. (2025) linked active play to better movement in Down syndrome. Together these papers hint that simple daily habits—zinc, exercise, dental checks—may each help a different body system.
Why it matters
Children with Down syndrome get sick often. A cheap mineral pill cut infections in this small study. Ask the pediatrician to check zinc levels. If they are low, a supplement might keep your client in school and ready to learn.
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02At a glance
03Original abstract
The effect of 4 months of oral zinc supplementation on immune functions in non-institutionalized young female and male Down's syndrome (DS) subjects was studied. Along with plasma levels of zinc, the immune parameters, measured before and after zinc treatment, were plasma levels of thymulin, the percentage and the absolute number of circulating white blood cells, total lymphocytes, lymphocyte subpopulations, the mitogen-induced lymphocyte proliferation, the production of interleukin-2, and the activity of stimulated granulocytes. Some immune parameters were significantly influenced by zinc treatment. In particular, a normalization of thymulin and zinc plasma levels were found in these subjects after zinc supplementation. At the end of the clinical trial, in vitro lymphocyte proliferation and polymorphonuclear activity also increased and reached normal values. Zinc administration exerted a positive clinical effect in these children, since a reduced incidence of infections was found.
Journal of intellectual disability research : JIDR, 1994 · doi:10.1111/j.1365-2788.1994.tb00370.x