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zinc sulfate

Generic Zinc Sulfate
Used for Nutritional Deficiency

Zinc is a supplement that's taken by mouth to prevent and treat low levels of zinc. There are different forms of zinc, like zinc sulfate and zinc gluconate. Zinc supplements come in different formulations (e.g., tablets, liquid) that are available over the counter. Your dosage depends on your age and the form of zinc you're taking, so follow the directions on the manufacturer's label or your provider's instructions. Side effects aren't common, but you might have an upset stomach and a metallic taste in your mouth if you take too much zinc.

Reviewed by:Last reviewed on October 15, 2023
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What is Zinc supplements?

What is Zinc supplements used for?

  • Low blood levels of zinc

How Zinc supplements works

Zinc supplements raise the level of zinc in your body. Your body needs zinc to help your immune system fight off infections, make genetic material (e.g., DNA) and proteins, and help with healing wounds. It's also needed during pregnancy and childhood for proper growth and development.

Drug facts

Common BrandsNo brand available
Drug ClassDietary supplement
Controlled Substance ClassificationNot a controlled medication
Generic StatusNo lower-cost generic available
AvailabilityOver-the-counter
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Side effects of Zinc supplements

The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.

Common Side Effects

  • Side effects aren't common. See Other Side Effects.

Less Common Side Effects

Source: NIH

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Pros and cons of Zinc supplements

Pros

  • Available over the counter
  • Available as lower-cost generics
  • Safe for pregnant people

Cons

  • Can cause stomach problems if you take too much zinc
  • Your body might absorb less zinc when you take it with food
  • Can interact with other medications, such as certain antibiotics and diuretics
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Pharmacist tips for Zinc supplements

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  • There are several manufacturers and products of zinc supplements that contain different strengths or even combinations of different forms of zinc. Carefully read the package label or ask your provider about the strength of the zinc supplement you have. Ask your provider or pharmacist if you're not sure which product is right for you.
  • Zinc can interact with many common medications, such as ACE inhibitors, quinolone antibiotics, and tetracycline antibiotics. Tell your provider or pharmacist about all the medications you're taking before starting a zinc supplement. Don't start any new medications while you're taking a zinc supplement without talking to your provider or pharmacist first. You might need to take the zinc supplement and your other medications at different times to avoid drug interactions.
  • Speak to your provider before starting zinc supplements if you're pregnant, planning to become pregnant, or breastfeeding. Your provider can recommend how much zinc you should take and which formulation is safe for you and your child.
  • Don't take more than one zinc supplement unless your provider recommended you to do so. Taking too much zinc can cause side effects, such as nausea and vomiting.
  • Keep zinc supplements out of reach of children so that they don't accidentally take it. Call your local Poison Control Center right away at 1-800-222-1222 if your child took zinc supplements and they have diarrhea or stomach pain.
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Risks and warnings for Zinc supplements

Zinc supplements can cause some serious health issues. This risk may be even higher for certain groups. If this worries you, talk to your doctor or pharmacist about other options.

Risks with taking too much zinc

Taking too much zinc can cause stomach problems, such as nausea, vomiting, diarrhea, stomach pain, and loss of appetite. You might also have a metallic taste in your mouth. Some people might also have headaches or feel dizzy. It's also possible that taking too much zinc for a long time can negatively affect your immune system and lower the levels of certain nutrients in your body (e.g., copper, magnesium). Speak with your provider about the amount of zinc you should be taking and for how long. Talk to your provider if you experience any of these symptoms.

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Zinc supplements dosage

Typical dosage for Zinc supplements

In general, the recommended amount of zinc you need varies depending on your age and gender. Different zinc supplements can contain different strengths and forms of zinc. Take your product according to the directions on manufacturer's label or according to your provider's instructions.

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News about Zinc supplements

References

Best studies we found

Institute of Medicine. (2001). Zinc. Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc.

National Institutes of Health, Office of Dietary Supplements. (2022). Zinc: Fact sheet for consumers.

National Sanitation Foundation. (n.d.). Supplement and vitamin certification.

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