What it is used for
- Treating and preventing zinc deficiency
- Supporting immune function and wound healing in people with low zinc
- Used alongside oral rehydration in childhood diarrhoea in some settings
- Supporting certain skin conditions when advised by a clinician
How it works
Zinc is a trace mineral involved in many enzymes that support the immune system, wound healing, taste and smell, and normal growth. Supplementing corrects deficiency and helps these processes work properly.
How it is taken
Available as tablets, capsules, dispersible tablets, lozenges and liquid. It is often taken with food to reduce stomach upset, though some advice is to take it apart from certain other minerals. Take it exactly as your doctor, pharmacist or the label directs, and avoid high doses over long periods unless supervised.
No doses here on purpose. The right strength and schedule depend on you — only a doctor or pharmacist should set them. Always follow your prescription and the label.
Common side effects
- Nausea or stomach upset
- Metallic taste
- Diarrhoea
Serious effects — get help
- Severe vomiting or abdominal pain
- Signs of copper deficiency from long-term high doses, such as anaemia or numbness
- Allergic reaction (rare)
If a reaction is severe — for example trouble breathing, swelling of the face or throat, or collapse — go to the nearest emergency room now or call your local emergency number. Do not wait for an online consultation.
Interactions to watch
- Iron and calcium supplements, which can reduce each other's absorption
- Some antibiotics (tetracyclines, quinolones)
- Long-term high-dose zinc, which can lower copper levels
- Certain water pills that increase zinc loss
Who should take care
- Avoid long-term high doses unless monitored, as they can cause copper deficiency
- Tell your clinician about other supplements you take to avoid mineral imbalances
- Zinc lozenges for colds should be used as directed and not for prolonged periods
- Discuss use in pregnancy and breastfeeding with your clinician