Walk down the cold-remedy aisle of any pharmacy, and you'll likely find a shelf full of zinc supplements. But what exactly does zinc do and why is it considered crucial for our health?

Recent research has shed light on the role of zinc in our immune system. Scientists have discovered that zinc acts as a gatekeeper, playing a vital role in immune function. It helps our bodies fight off infections, including the common cold and other respiratory illnesses.

While accurately measuring zinc levels in the body remains a challenge, it is believed that many people do not consume enough zinc in their diets to support optimal immune function. Severe zinc deficiency can lead to various health problems, including stunted growth, hair loss, delayed wound healing, and weakened defenses against infections.

To determine zinc deficiency, dietary intake is currently the best indicator. Some groups, such as pregnant women or individuals with conditions that affect zinc absorption, may be at a higher risk of deficiency.

Studies have shown that individuals with zinc deficiencies are more susceptible to infections. In fact, zinc supplements have been found to reduce the frequency of infections in healthy elderly individuals. However, more research is needed to determine the potential benefits of zinc supplements in preventing COVID-19.

Ensuring an adequate intake of zinc-rich foods, such as seafood, red meat, and nuts, can help maintain optimal zinc levels. It is important to be mindful of substances like phytates, found in whole-grain bread and cereals, which can interfere with zinc absorption.