Zinc Supplements: What to Know Before You Buy

Zinc supplements are available in different forms, strengths and combinations, so products labelled simply “Zinc” are not necessarily equivalent.

You may see zinc citrate, zinc gluconate, zinc sulphate, zinc amino acid chelates and other zinc compounds. Some products contain zinc alone, while others combine it with nutrients such as vitamin C, vitamin B6, magnesium or other vitamins and minerals.

The weight of the zinc compound is also not necessarily the amount of zinc the product provides.

This guide explains the key label details to compare, including zinc form, elemental zinc, serving size, additional ingredients and important safety considerations before choosing a zinc supplement.

What Is Zinc?

Zinc is an essential mineral needed for many normal functions in the body.

It is involved in processes including cell growth and division and is required for normal immune, skin and growth functions.

Your body cannot make zinc, so it must come from food or other dietary sources.

Food sources of zinc can include:

  • meat and poultry
  • fish and seafood
  • oysters
  • eggs
  • dairy foods
  • wholegrains
  • legumes
  • nuts and seeds

A zinc supplement should therefore be considered alongside your overall diet and individual circumstances rather than assumed to be necessary for everyone.

Who Is This Guide For?

This guide may be useful if you:

  • are comparing zinc supplements for the first time
  • want to understand different zinc compounds
  • are unsure what elemental zinc means
  • are comparing tablets, capsules or lozenges
  • want to understand serving sizes and strengths
  • already use a multivitamin or mineral formula containing zinc
  • want to check for vitamin B6 or other ingredient overlap
  • are comparing cost per serve

This guide provides general purchasing information rather than personalised medical or nutrition advice.

Start With the Zinc Form

Zinc supplements can use several different zinc compounds.

Depending on the product, labels may include forms such as:

  • zinc citrate
  • zinc gluconate
  • zinc sulfate
  • zinc amino acid chelate
  • zinc picolinate
  • other zinc salts or chelated forms

The form of zinc is one useful label detail, but it should not be considered in isolation.

Also compare:

  • the amount of zinc actually provided
  • serving size
  • number of tablets or capsules required
  • additional active ingredients
  • directions and warnings
  • cost per serve

Do not assume that a particular zinc form is automatically the best option for every customer simply because of its name or marketing description.

What Does Elemental Zinc Mean?

This is one of the most useful concepts when comparing zinc products.

Zinc in a supplement is normally supplied as part of a larger compound.

The total weight of that compound is therefore not necessarily the amount of zinc the product provides.

An Australian product label may show a quantity of a zinc compound followed by wording indicating how much zinc that ingredient is equivalent to providing.

When comparing two products, look for the amount of zinc actually provided by the labelled dose.

Do not compare products only by the larger weight of the zinc compound.

Do Not Compare Front-Label Numbers Alone

A large number printed on the front of a supplement does not necessarily tell you how much elemental zinc you will consume.

Before comparing strength, check the detailed label for:

  • the zinc compound
  • the amount of zinc it provides
  • number of tablets or capsules in one dose
  • recommended frequency

This makes it easier to compare products accurately rather than relying on pack design or headline numbers.

Single-Zinc vs Combination Products

Some supplements provide zinc as the main active nutrient.

Others combine zinc with ingredients such as:

  • vitamin C
  • vitamin B6
  • magnesium
  • vitamin A
  • selenium
  • other vitamins and minerals

A combination product can be convenient when those additional ingredients are specifically wanted, but a longer ingredient list is not automatically better.

Check whether the added nutrients duplicate other products you already use.

Check Vitamin B6 in Zinc Products

Some zinc supplements contain vitamin B6 as an additional active ingredient.

Vitamin B6 can also be present in:

  • multivitamins
  • B-complex supplements
  • magnesium products
  • iron supplements
  • other vitamin and mineral combinations

The Therapeutic Goods Administration warns that supplementary vitamin B6 can cause peripheral neuropathy, which may cause tingling, burning or numbness.

The risk can be difficult to recognise when several products containing vitamin B6 are used at the same time.

Vitamin B6 may appear on labels under ingredient names such as:

  • pyridoxine hydrochloride
  • pyridoxal 5-phosphate
  • pyridoxal 5-phosphate monohydrate

If your zinc product contains vitamin B6, compare it with all your other supplements rather than considering the zinc product alone.

See B Vitamins: What to Know Before You Buy for more information about vitamin B6 overlap.

Check Whether Your Multivitamin Already Contains Zinc

Zinc is a common ingredient in multivitamin and multi-mineral formulas.

Before adding a stand-alone zinc product, check:

  • your multivitamin
  • multi-mineral formula
  • magnesium product
  • immune-support supplement
  • other combination vitamin formulas

Products with completely different front-label purposes can still contain the same mineral.

See How to Choose a Multivitamin for more information about checking nutrient overlap.

More Zinc Is Not Automatically Better

Zinc is essential, but excessive supplemental zinc can cause adverse effects.

Healthdirect advises that too much zinc can cause effects such as:

  • nausea
  • vomiting
  • diarrhoea
  • headaches

Excessive zinc intake can also interfere with the body's ability to absorb other nutrients.

This means a higher-strength zinc supplement should not automatically be considered a better choice.

Follow the current product directions and seek professional advice before using higher supplemental amounts.

Zinc & Copper

One important issue with excessive or prolonged zinc supplementation is its effect on copper.

Healthdirect notes that too much zinc can interfere with the body's ability to absorb nutrients such as copper.

Copper is itself an essential mineral, so unnecessarily increasing zinc intake can potentially create an imbalance rather than improving nutrition.

This is particularly relevant when:

  • using higher-strength zinc products
  • taking zinc for extended periods
  • combining several zinc-containing supplements

If you have been advised to use a higher amount of zinc for a specific reason, follow your healthcare professional's recommended dose and duration.

Do Not Self-Diagnose Zinc Deficiency

Symptoms associated with low zinc are not specific to zinc deficiency.

Healthdirect notes that low zinc can be associated with issues such as changes to skin or hair, slower wound healing and other symptoms, but these can also have many other causes.

People who may be more likely to have low zinc can include those with:

  • conditions affecting digestion or absorption
  • certain dietary restrictions
  • recent illness or surgery
  • higher requirements during particular life stages

If you think your zinc intake or zinc status may be low, speak with your doctor rather than diagnosing deficiency from symptoms alone.

Zinc Requirements Vary

There is no single zinc intake requirement that applies to everybody.

Australian Nutrient Reference Values vary according to factors including:

  • age
  • sex
  • pregnancy
  • breastfeeding
  • life stage

This is another reason that the highest-strength product is not automatically the most suitable choice.

Your overall dietary intake and individual circumstances matter.

Animal vs Plant Sources of Zinc

Zinc is available from both animal and plant foods.

Healthdirect notes that zinc tends to be absorbed more readily from animal-based foods.

Animal sources can include:

  • meat
  • poultry
  • fish
  • oysters and other seafood
  • dairy foods
  • eggs

Plant sources can include:

  • legumes
  • nuts
  • seeds
  • wholegrains

People following vegetarian or vegan diets may therefore need to pay particular attention to overall zinc intake and dietary variety.

An Accredited Practising Dietitian can help assess a plant-based diet if you are concerned about zinc or other nutrient intake.

Food First

Most people should consider dietary sources before automatically adding another mineral supplement.

Useful zinc-containing foods can include:

  • seafood
  • lean meat
  • chicken
  • eggs
  • dairy foods
  • wholegrains
  • beans and lentils
  • nuts and seeds

Healthdirect advises that most people can obtain enough zinc from a balanced diet.

If your doctor determines that your zinc level is low, supplementation may be recommended for a particular period or dose.

Tablets, Capsules or Lozenges?

Zinc is available in several supplement formats.

Tablets

Tablets provide a pre-measured dose and are common in both zinc-only and combination formulas.

Capsules

Capsules provide another pre-measured format and may contain zinc alone or additional nutrients.

Lozenges

Some zinc products are supplied as lozenges that dissolve slowly in the mouth.

These products can differ from ordinary zinc tablets in formulation, directions and additional ingredients.

Do not assume that a lozenge and a standard zinc tablet provide the same amount or are designed to be used in the same way.

Always compare the complete label.

Check the Serving Size

A bottle containing 100 tablets does not necessarily provide 100 days of use.

Check:

  • tablets, capsules or lozenges per labelled dose
  • recommended frequency
  • amount of zinc provided by that complete dose
  • number of usable serves in the container

This also helps make cost comparisons more meaningful.

Zinc & Medicines

Mineral supplements can interact with some medicines or affect how medicines are absorbed.

If you take prescription or regular medicines, particularly medicines with specific instructions about minerals, ask your pharmacist whether your zinc supplement needs to be separated from your medication.

Do not assume that vitamins and minerals cannot interact with medicines simply because they are available without prescription.

Pregnancy & Zinc

Zinc requirements change during pregnancy and breastfeeding.

However, this does not mean that every pregnant person should independently add a high-strength zinc supplement.

Pregnancy multivitamins and prenatal products may already contain zinc alongside other nutrients.

If you are pregnant, planning pregnancy or breastfeeding:

  • check your prenatal or multivitamin for zinc
  • avoid unnecessarily combining several mineral supplements
  • follow the advice of your doctor, pharmacist or midwife

Children & Zinc Supplements

Children have different zinc requirements from adults.

Do not give an adult zinc supplement to a child unless the product specifically provides appropriate directions for that age or a healthcare professional has recommended it.

Keep all supplements securely out of reach of young children.

Check Added Ingredients

Depending on the product, a zinc supplement may also contain:

  • vitamin C
  • vitamin B6
  • vitamin A
  • magnesium
  • selenium
  • other vitamins and minerals
  • herbal ingredients

Check whether you actually want these additional ingredients and whether they are already present in your existing supplement routine.

A more complicated formula is not automatically better.

Compare Cost Per Serve

Container price alone does not provide enough information to compare zinc supplements.

Check:

  • purchase price
  • number of tablets, capsules or lozenges
  • number required per labelled dose
  • amount of zinc provided per dose
  • number of usable serves
  • additional active ingredients

This gives a more useful comparison than bottle size alone.

How to Compare a Zinc Supplement Before You Buy

Before choosing a product, ask:

  • What form of zinc does it contain?
  • How much zinc does the labelled dose actually provide?
  • Am I comparing elemental zinc rather than only compound weight?
  • How many tablets, capsules or lozenges make one dose?
  • How often is the product directed to be used?
  • Does it contain vitamin B6?
  • Does my multivitamin or another supplement already contain zinc?
  • Am I combining several sources of supplementary zinc?
  • Does it contain other added vitamins, minerals or herbs?
  • What warnings appear on the current label?
  • Could it interact with any medicines I take?
  • How many usable serves are in the container?
  • What is the cost per serve?
  • If I think I have low zinc, should I seek professional assessment rather than self-treat?

Explore Zinc Supplements

Browse current Zinc products at Elite Vitamin Zone.

You can also explore the complete Vitamins & Minerals range.

You may also find these EVZ guides useful:

Or return to Vitamins & Minerals Guides.

Frequently Asked Questions

What is elemental zinc?

Elemental zinc is the amount of zinc actually supplied by a zinc compound. When comparing supplements, look for the amount of zinc provided by the labelled dose rather than relying only on the larger weight of the zinc compound.

Which form of zinc should I choose?

There is no single zinc form that is automatically right for everybody. Compare the form, amount of zinc supplied, complete daily dose, additional ingredients, directions and your individual circumstances.

Is the zinc product with the highest strength the best?

No. Higher amounts are not automatically more appropriate, and excessive zinc can cause adverse effects and interfere with absorption of other nutrients such as copper.

Can zinc supplements cause side effects?

Yes. Healthdirect advises that excessive zinc can cause nausea, vomiting, diarrhoea and headaches.

Can taking too much zinc affect copper?

Yes. Too much zinc can interfere with copper absorption. This is particularly relevant with unnecessarily high supplemental amounts or prolonged use.

Can my multivitamin already contain zinc?

Yes. Zinc is commonly included in multivitamin and multi-mineral products. Check your complete supplement routine before adding a separate zinc product.

Why should I check vitamin B6 in a zinc supplement?

Some zinc products also contain vitamin B6. The TGA advises that supplementary B6 can cause peripheral neuropathy, particularly when several B6-containing supplements are combined.

Do vegetarians and vegans need more attention to zinc?

Zinc can be obtained from plant foods, but Healthdirect notes that it tends to be more readily absorbed from animal-based foods. People following vegetarian or vegan diets may therefore benefit from paying particular attention to their zinc intake and overall dietary variety.

Can I tell if I am zinc deficient from symptoms?

No. Symptoms associated with low zinc can have other causes. Speak with your doctor if you think you may have zinc deficiency rather than diagnosing it from symptoms alone.

Are zinc lozenges the same as zinc tablets?

Not necessarily. They can differ in zinc form, amount, serving instructions and additional ingredients. Compare the complete product label.

Can zinc interact with medicines?

Yes. Mineral supplements can affect some medicines or their absorption. Ask your doctor or pharmacist about zinc if you take regular medication.

Do I need a zinc supplement if I eat a varied diet?

Not necessarily. Zinc is available from a wide range of foods, and Healthdirect advises that most people can obtain enough from a balanced diet.

Further Information

For additional Australian information about zinc, dietary intake and supplement use, refer to:

Product formulas, zinc forms, strengths, serving sizes, directions and warnings can change. Always check the current product label before purchase and use.

Important Information

This guide provides general information about zinc supplements and factors customers may wish to consider when comparing products. It is not a substitute for individual medical, nutrition or pharmacy advice and should not be used to diagnose or treat zinc deficiency.

Always read the label and follow the directions for use. If you think you may have zinc deficiency, have a health condition, take medicines, are pregnant or breastfeeding, follow a restrictive diet, use several zinc-containing supplements or are considering higher or prolonged supplemental zinc intake, seek advice from an appropriate healthcare professional.