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“Adult men need 11 milligrams (mg) per day of zinc, while most women need 8 mg. Women who are pregnant need 11 mg per day, and those who are breastfeeding need 12 mg per day.”
Zinc toxicity will dissipate as the excessive intake decreases. But some people may still experience long-term side effects from taking too much zinc, like a compromised immune system.
Zinc deficiency is defined either as insufficient zinc to meet the needs of the body, or as a serum zinc level below the normal range. However, since a decrease in the serum concentration is only detectable after long-term or severe depletion, serum zinc is not a reliable biomarker for zinc status. [1]
However, individuals over 60 often consume less than 50% of the recommended zinc intake, which is crucial for proper body function. Data from the Third Health and Nutrition Survey in the United States revealed that only 42.5% of adults over 71 years old met adequate zinc intake levels, with many suffering from zinc deficiency.
Research also links a high-fiber diet with improved cognitive function in adults over 60 years of age. Fiber-rich foods include beans, whole grains, nuts, seeds and many fruits and vegetables.
Zinc is an inexpensive and effective part of treatment of diarrhea among children in the developing world. Zinc becomes depleted in the body during diarrhea and replenishing zinc with a 10- to 14-day course of treatment can reduce the duration and severity of diarrheal episodes and may also prevent future episodes for as long as three months. [175]