Introduction: the body’s gatekeeper
Zinc is an essential trace mineral, the second most abundant in the body after iron. It is needed for the activity of more than 300 enzymes and for the proper functioning of the immune system, protein synthesis, wound healing and cell division. The body does not store zinc, so it needs a steady supply from food or supplements. The densest source by a wide margin is oysters; after them come red meat, pumpkin seeds, cashews and lentils. Zinc deficiency is relatively common, especially among vegetarians and vegans, because absorption from plant sources is lower.
Benefits (Pros)
1. Strengthening the immune system
Zinc is a cornerstone of immune function. It helps in the development and activity of the white blood cells that fight pathogens. Studies have shown that taking zinc lozenges as soon as cold symptoms appear can shorten the illness by 33%.
2. Skin health and wound healing
Because of its central role in producing collagen and repairing DNA, zinc is often used to treat skin problems such as acne, eczema and ulcers. It helps reduce skin inflammation and regulate oil (sebum) production, which makes it a popular supplement for improving the look of the skin.
3. Hormonal balance and fertility
Zinc is essential for testosterone production and male fertility. Low zinc levels are linked to lower sperm quality and low testosterone levels. In women, too, it plays an important role in ovulation and egg development.
Downsides and side effects (Cons)
1. Upsetting the copper balance
Zinc and copper compete for the same absorption sites in the body. Long-term intake of high doses of zinc (above 40-50 mg per day) can cause copper deficiency, which can lead to anemia and neurological problems. For long-term use, it is recommended to take a supplement that also includes a small amount of copper.
2. Nausea and stomach pain
Zinc is known to irritate the stomach, especially when taken on an empty stomach. Symptoms can include strong nausea, vomiting and abdominal pain. The simple solution is to always take the supplement after a substantial meal and never on an empty stomach.
3. Interaction with antibiotics
Zinc can interfere with the absorption of certain types of antibiotics (such as tetracyclines and quinolones). It is recommended to separate taking zinc and taking the antibiotic by at least 2-4 hours.
Summary
Zinc is an essential supplement for keeping the body resistant to disease and maintaining a healthy appearance (skin, hair). It is especially useful during periods of exposure to viruses or for treating specific skin problems. However, the iron rule of taking zinc is “more is not always better” — stick to moderate doses and be mindful of the balance with other minerals.