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Zinc Supplements
Compare zinc supplements by elemental zinc, disclosed form, copper and daily cost. Read the serving in context: dietary needs, label NRV and short-course lozenge use are different things. More zinc does not automatically mean a better product.
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Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Testing evidence
Evidence status
Recognised certification
Manufacturer statement
Nutrasource registry page for this product states: "IGEN™ Certified" and "This product has PASSED because it does not contain detectable amounts of genetically engineered GMO proteins and genes included in the IGEN™ testing panel."
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Testing evidence
Evidence status
Verified independent evidence
Manufacturer statement
Osavi’s own product quality/certificate pages state: “Each batch is sent to an independent laboratory - J.S.Hamilton or GBA and analysed for, i.a. heavy metal content, microbiological purity and substance content as declared on the label.” The lot certificate page for Zinc + Copper, 15 mg + 1 mg also says: “This supplement has been laboratory tested by an independent laboratory and meets the requirements for purity and composition.”
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Testing evidence
Evidence status
Testing claimed
Manufacturer statement
Manufacturer page says "Product Testing & Quality Controls" and includes a section "Who performs your testing, an in-house lab or an independent third party?" plus the product page says "Are your products batch-tested or just tested on the formula once?" and "Do you have a Certificate of Analysis (CoA) for your products or their ingredients?" but I did not find a product-specific COA/lab report or a certifying-body registry entry for this VitaBright zinc+copper product.
Compare elemental zinc, not zinc-compound weight. Dose and price use the same recorded daily serving. Copper is shown separately; adding copper does not make high-dose zinc suitable for routine use. Dose colours describe adult nutritional context, not a universal studied range. Read the dose guide ↓
Nutrasource registry page for this product states: "IGEN™ Certified" and "This product has PASSED because it does not contain detectable amounts of genetically engineered GMO proteins and genes included in the IGEN™ testing panel."
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Osavi’s own product quality/certificate pages state: “Each batch is sent to an independent laboratory - J.S.Hamilton or GBA and analysed for, i.a. heavy metal content, microbiological purity and substance content as declared on the label.” The lot certificate page for Zinc + Copper, 15 mg + 1 mg also says: “This supplement has been laboratory tested by an independent laboratory and meets the requirements for purity and composition.”
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Thorne product page states: "This product has been third-party tested and certified to verify what's in the package matches what's on the label and to confirm it contains no unsafe levels of contaminants, such as heavy metals, pesticides, and microorganisms." NSF Certified for Sport registry page for Thorne® Zinc Picolinate 30 mg confirms the product is certified, with brand Thorne, product type Immune Aid/Mineral, package size 60, serving size 1 capsule, and website thorne.com.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Manufacturer page says "Product Testing & Quality Controls" and includes a section "Who performs your testing, an in-house lab or an independent third party?" plus the product page says "Are your products batch-tested or just tested on the formula once?" and "Do you have a Certificate of Analysis (CoA) for your products or their ingredients?" but I did not find a product-specific COA/lab report or a certifying-body registry entry for this VitaBright zinc+copper product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Zipvit’s own product page states “4/4 TESTS PASSED”, “1/1 CLAIMS VERIFIED”, and “INDEPENDENTLY LAB TESTED,” but I did not locate a readable COA/lab report or an independent certifying-body registry entry confirming this specific product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Manufacturer FAQ says: "Are your products tested for heavy metals? Yes, all / majority of our food supplements are tested for heavy metals. The heavy metals tested are generally: Arsenic, Cadmium, Lead and Mercury." The product page also says: "Every 3 months production samples are sent to an internationally recognised laboratory..."
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Manufacturer page says: "All Veganicity products are registered with the Vegan Society" and the product page also says "GMP-made in the UK"; the Amazon listing says "Many people find Zinc Citrate provides more efficient absorption and utilisation by the body." These are claims, but I found no independently verifiable third-party testing/certification page for this specific zinc product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Amazon listing images/text say "Rigourously Tested" and "Products are quality tested every 30 minutes" for Solgar Zinc Picolinate 22 mg, but I did not find an independently verifiable third-party lab report or certification registry entry for this specific product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
WeightWorld’s own product page says the tablets are "formulated using the most bioavailable form of zinc (zinc bisglycinate)" and that the brand is "Third party tested" / "Every formulation backed by rigorous analytical testing" on its third-party-tested page, but I did not find an independently verifiable certificate or lab report for this specific zinc product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Manufacturer page says: "We send our supplements to accredited third-party laboratories to verify purity and quality without any internal bias" and the product page says it is "Made to strict GMP-certified standards" and is on the site’s "Third-Party Tested" section.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Search result and registry entry title: "Zinc Balance® | Jarrow Formulas Inc. | Certifications by Nutrasource" on litesting.com, which is Nutrasource's certifications registry.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Amazon listing and Life Extension product page state: "HIGH QUALITY: Life Extension zinc tablets are tested for quality and purity in independent laboratories" and Life Extension's quality FAQ says "the ingredients are verified using advanced analytical methods like high performance liquid chromatography and mass spectrometry to ensure every product accurately meets label claims."
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Manufacturer page says: "We Have Your Supplement Tested By A Third-Party Laboratory" and "The final products are tested once more to ensure they meet quality standards."
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Manufacturer page says: "Quality Guaranteed- Manufactured and tested to ISO and GMP standards in a BRC certified facility" and the homepage says "3rd Party Tested".
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Vitamatic’s own product page for the zinc gummies says “Lab Tested” and the Amazon listing image shows “GMP” and “Lab Tested,” but I did not locate any independent COA/lab report for this specific product or any certifying-body registry entry confirming a third-party certification.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Nutrasource registry page for this product states: "IGEN™ Certified" and "This product has PASSED because it does not contain detectable amounts of genetically engineered GMO proteins and genes included in the IGEN™ testing panel."
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Osavi’s own product quality/certificate pages state: “Each batch is sent to an independent laboratory - J.S.Hamilton or GBA and analysed for, i.a. heavy metal content, microbiological purity and substance content as declared on the label.” The lot certificate page for Zinc + Copper, 15 mg + 1 mg also says: “This supplement has been laboratory tested by an independent laboratory and meets the requirements for purity and composition.”
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Thorne product page states: "This product has been third-party tested and certified to verify what's in the package matches what's on the label and to confirm it contains no unsafe levels of contaminants, such as heavy metals, pesticides, and microorganisms." NSF Certified for Sport registry page for Thorne® Zinc Picolinate 30 mg confirms the product is certified, with brand Thorne, product type Immune Aid/Mineral, package size 60, serving size 1 capsule, and website thorne.com.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Manufacturer page says "Product Testing & Quality Controls" and includes a section "Who performs your testing, an in-house lab or an independent third party?" plus the product page says "Are your products batch-tested or just tested on the formula once?" and "Do you have a Certificate of Analysis (CoA) for your products or their ingredients?" but I did not find a product-specific COA/lab report or a certifying-body registry entry for this VitaBright zinc+copper product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Zipvit’s own product page states “4/4 TESTS PASSED”, “1/1 CLAIMS VERIFIED”, and “INDEPENDENTLY LAB TESTED,” but I did not locate a readable COA/lab report or an independent certifying-body registry entry confirming this specific product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Manufacturer FAQ says: "Are your products tested for heavy metals? Yes, all / majority of our food supplements are tested for heavy metals. The heavy metals tested are generally: Arsenic, Cadmium, Lead and Mercury." The product page also says: "Every 3 months production samples are sent to an internationally recognised laboratory..."
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Manufacturer page says: "All Veganicity products are registered with the Vegan Society" and the product page also says "GMP-made in the UK"; the Amazon listing says "Many people find Zinc Citrate provides more efficient absorption and utilisation by the body." These are claims, but I found no independently verifiable third-party testing/certification page for this specific zinc product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Amazon listing images/text say "Rigourously Tested" and "Products are quality tested every 30 minutes" for Solgar Zinc Picolinate 22 mg, but I did not find an independently verifiable third-party lab report or certification registry entry for this specific product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
WeightWorld’s own product page says the tablets are "formulated using the most bioavailable form of zinc (zinc bisglycinate)" and that the brand is "Third party tested" / "Every formulation backed by rigorous analytical testing" on its third-party-tested page, but I did not find an independently verifiable certificate or lab report for this specific zinc product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Manufacturer page says: "We send our supplements to accredited third-party laboratories to verify purity and quality without any internal bias" and the product page says it is "Made to strict GMP-certified standards" and is on the site’s "Third-Party Tested" section.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Search result and registry entry title: "Zinc Balance® | Jarrow Formulas Inc. | Certifications by Nutrasource" on litesting.com, which is Nutrasource's certifications registry.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Amazon listing and Life Extension product page state: "HIGH QUALITY: Life Extension zinc tablets are tested for quality and purity in independent laboratories" and Life Extension's quality FAQ says "the ingredients are verified using advanced analytical methods like high performance liquid chromatography and mass spectrometry to ensure every product accurately meets label claims."
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Manufacturer page says: "We Have Your Supplement Tested By A Third-Party Laboratory" and "The final products are tested once more to ensure they meet quality standards."
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Manufacturer page says: "Quality Guaranteed- Manufactured and tested to ISO and GMP standards in a BRC certified facility" and the homepage says "3rd Party Tested".
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Vitamatic’s own product page for the zinc gummies says “Lab Tested” and the Amazon listing image shows “GMP” and “Lab Tested,” but I did not locate any independent COA/lab report for this specific product or any certifying-body registry entry confirming a third-party certification.
One-time purchase prices; delivery and conditional discounts excluded. Daily cost uses the recorded label serving. Comparison amounts are not personal dose recommendations. Unknown Prime eligibility is not treated as confirmed.
Zinc forms & combinations explained
Form pills identify the zinc ingredient, while the smaller label names the delivery format. These are comparison aids, not a ranking of absorption or clinical effectiveness. Blends disclose a combined elemental amount unless the manufacturer gives a breakdown.
Picolinate
Zinc paired with picolinic acid
Label example
Zinc as picolinate
Compare
Elemental mg, serving and cost
A named salt does not establish that this retail product improves outcomes more than another. We do not award an automatic premium for picolinate.
Bisglycinate / glycinate
Glycine-associated zinc
Label wording
Preserve the form actually disclosed
Blend caution
Glycinate marketing and ingredient names can differ
Bisglycinate products are often marketed as chelated. We record the claim without assuming that every formulation has the same absorption or tolerance.
Citrate
Zinc associated with citrate
Label example
Zinc as citrate
Read carefully
Compound mass differs from elemental zinc
A 97mg zinc-citrate headline does not mean 97mg elemental zinc. We require a nutrient amount rather than applying a generic chemical conversion.
Gluconate
Zinc associated with gluconate
Formats here
Tablets and mixed-form lozenges
Compare
Actual zinc per daily serving
Gluconate is a legitimate comparison form. A cold study using a particular lozenge regimen does not establish equivalent results from an ordinary once-daily tablet.
Sulphate
A zinc salt used in supplements
Label example
Zinc sulphate monohydrate
Combination
May be paired with copper sulphate
The declared zinc nutrient amount is compared, not the weight of the hydrated salt. No automatic score deduction is made solely for this form.
Oxide
An inorganic zinc compound
Label detail
May appear within an amino-acid blend
Avoid assumptions
A blend is not necessarily bisglycinate
We preserve oxide where that is what the ingredient list names. Salt labels alone do not settle suitability; dose, composition and individual tolerance also matter.
Acetate
Zinc associated with acetate
Formats here
Lozenges
Use matters
Daily directions and short courses differ
Follow the specific UK label. As-needed lozenges with a maximum daily count are held outside this fixed-daily comparison until a suitable separate comparison is available.
Methionine
Zinc associated with methionine
Label example
Mono-L-methionine zinc sulphate
Branded example
OptiZinc where disclosed
The methionine label groups related disclosed ingredients. It does not verify a trademark licence, certify testing or earn an automatic formulation bonus.
Orotate
Zinc associated with orotate
Product set
Appears in a mixed-form capsule
Amount
Combined elemental zinc is declared
The contribution of each salt is unknown where no breakdown is supplied. A beadlet or delivery claim is recorded without assuming better clinical results.
Zinc + Copper
Two separately declared minerals
Table reading
Copper is shown in mg per day
Conversion
750µg copper = 0.75mg
Included with no disclosed amount is not the same as zero. Added copper does not cancel high-dose zinc cautions. We do not endorse a universal zinc-to-copper ratio.
Not disclosed
Chemistry or panel unresolved
Meaning
No form inferred from a headline
Publication
Unresolved core amounts are held for review
A product name, pack count or ratio cannot replace a clear elemental amount and serving instruction.
Zinc dosage: UK references and our comparison bands
Keep these reference amounts separate
Context
What it means
UK adult dietary need
For ages 19–64, NHS guidance lists 9.5mg/day for men and 7mg/day for women. These are dietary needs, not extra supplement prescriptions. NHS zinc guidance.
Label reference: 10mg
10mg is the nutrition-labelling reference: 15mg is 150%. %NRV measures an amount relative to a label reference; it does not measure absorption or prove that an extra supplement is needed. UK reference table.
NHS supplement advice
Do not take more than 25mg/day from zinc supplements unless advised by a doctor. This is supplement advice, distinct from a total-intake upper limit. NHS safety guidance.
European adult upper level
The SCF/EFSA adult upper level is 25mg/day from all sources for habitual intake. Food contributes, so a 25mg supplement can take total intake above it. An upper level is not a target or a sharp toxicity threshold. SCF opinion on zinc, pp. 191–200.
Research and short courses
Cold trials use different formulations and schedules. No universal “commonly studied” daily range is defensible across nutrition, deficiency treatment and short-course lozenges. Cochrane review.
Editorial dose context used in this adult comparison
Context
What it means
Below 7mg
Lower-dose product · amber. A small top-up may still suit a diet; this does not diagnose an inadequate intake. Dose component: clear-label starting score 95 minus 5.
7–10mg
Reference-scale amount · green. A comparison band around UK dietary and labelling references, not a recommended supplement range. Dose component: no context deduction.
Above 10–25mg
Higher supplemental dose · blue. Adds more than the label reference; extra amount is not automatically advantageous. Dose component: minus 15.
Above 25–under 50mg
Above NHS supplement advice · amber. Dose component: minus 30 for this general daily comparison.
50mg or more
High dose · copper context · amber. Dose component: minus 40. Copper inclusion does not remove this deduction.
Serving and intended use
More than two solid units per day subtract 5; more than four subtract 10. Unknown elemental amounts receive no dose verdict. As-needed short courses stay outside the fixed-daily table rather than being averaged or treated as long-term regimens.
These are transparent editorial choices, not validated clinical cut-offs. Overall scores also include formulation clarity, price, manufacturer transparency and label clarity. Testing is excluded while pending. No salt, high-dose headline or copper addition automatically earns a bonus. General top picks are limited to clear daily products supplying 7–15mg; the 15mg ceiling is an editorial shortlist choice, not official dosage guidance.
Zinc benefits: nutrition versus extra supplementation
Normal function
Zinc supports DNA and protein production, immune function, wound healing and taste. Meeting a requirement is different from showing benefit from additional zinc in someone whose intake is already sufficient. NIH nutrient overview.
Form claims
The evidence does not establish one universally best retail zinc form. A named chelate or absorption claim alone does not prove superior clinical results. NIH discussion of forms.
Interpreting the score
This is a comparison of documented product attributes and general nutritional context. It is not a clinical effectiveness score, a diagnosis or a personalised prescription.
Evidence by use
Evidence by goal
Goal
Evidence strength
What was assessed
Typical study context
Main limitation
Normal nutrient functions
Established role
Dietary zinc
Adequate nutrition
Does not prove extra benefit above sufficiency
Cold prevention
Low certainty; little or no benefit
Various zinc preparations
Preventive supplementation
No blanket prevention claim
Cold duration
Low certainty; possible reduction
Specific zinc regimens
Treatment begun during a cold
Formulations differ; more non-serious adverse effects
Testosterone
No demonstrated boost in one small zinc-sufficient study
ZMA supplement
14 healthy exercising men
Small study; not a deficiency-treatment trial
Inflammatory acne
Limited clinical evidence
Zinc gluconate
Specific clinical trial
Not proof of general skin improvement
Read the full evidence-by-goal detail
Colds and lozenges
A 2024 Cochrane review found little or no preventive benefit. Treatment might shorten a cold by roughly two days, but certainty was low and non-serious adverse effects increased. Results varied substantially by study. This does not validate every lozenge, an ordinary daily tablet or a high-dose routine. Read the review.
Zinc and testosterone
In a small study of 14 exercising men already consuming enough zinc, a zinc-containing ZMA supplement did not significantly increase total or free testosterone. This cannot answer every deficiency question, but it does not support a blanket “testosterone booster” claim. Koehler et al., 2009.
Skin and acne
A placebo-controlled inflammatory-acne trial reported benefit using zinc gluconate providing 30mg elemental zinc. That clinical context does not make 30mg a routine skin recommendation or prove benefit for all acne or hair complaints. Dreno et al., 1989.
When to take zinc
Use the actual label
Most recorded products specify food or a meal, while some specify before food. Follow the current product instructions. Persistent nausea is a reason to reassess use with a pharmacist rather than increase the dose.
Count the full serving
Two gummies or tablets can make one daily serving. The table uses that complete serving for both dose and cost. A label range uses its stated lower option and shows that basis; it does not imply the upper option is equally suitable.
Lozenges have distinct directions
Dissolving, chewing and swallowing are not interchangeable instructions. The captured UK Life Extension listing says one daily; Healthspan specifies an as-needed course. We do not substitute overseas directions or a trial protocol.
Zinc side effects and copper context
Who should be cautious?If any of the following apply to you, speak to a healthcare professional before taking Zinc - see the full detail below for why.
People taking prescribed medicines that interact with zinc
People using several zinc-containing products
People being treated for a zinc or copper disorder
Pregnant or breastfeeding adults; children require age-specific advice
Too much zinc
Large intakes can cause nausea, vomiting and appetite loss. At 50mg or more for weeks, zinc can interfere with copper absorption. Long-term use needs context even when the bottle contains copper. NIH excess-intake discussion.
Copper is not an antidote
Copper quantity and form are useful label facts. A fixed ratio is not a universal rule, and the presence of copper does not demonstrate that a high-zinc formulation is appropriate indefinitely. Compare total intake and duration with the guidance above.
When individual advice matters
Discuss supplementation with your clinician when investigating deficiency, during pregnancy or breastfeeding, with malabsorption or after gastrointestinal surgery. Existing copper disorders and prescribed zinc regimens require individual management rather than this general product ranking.
Zinc with copper, vitamin C and medicines
Read co-actives and medicine timing separately
Context
What it means
Copper
The table states the recorded daily amount, “Included · dose undisclosed”, “Not listed” or “Unknown”. Not listed means no copper in the captured ingredient list; it is not a laboratory result. No ideal Zn:Cu ratio is assumed.
Vitamin C and other actives
A combination can duplicate nutrients already in your stack. One listed product also contains 10mg B6; another has 200mg vitamin C. Read amounts on the product page and check your vitamin C products too.
Certain antibiotics
Quinolone or tetracycline antibiotics are generally taken at least 2 hours before or 4–6 hours after zinc. Confirm the specific medicine instructions with a pharmacist. NIH interaction guidance.
Taking 25mg or more supplemental iron at the same time can reduce zinc absorption. A pharmacist can help arrange prescribed supplements; do not stop iron treatment on the basis of this table. NIH mineral interaction discussion.
Zinc foods and possible deficiency
Food first
Meat, seafood, dairy, eggs, beans, nuts and whole grains provide zinc; fortified cereals can contribute. Phytates in some plant foods reduce absorption. A vegan label describes the product, not whether an individual needs it. NIH foods and intake context.
Deficiency needs interpretation
Malabsorption, gastrointestinal surgery and alcohol use disorder can increase risk. Taste changes or delayed healing are not specific enough to diagnose zinc deficiency. Review symptoms, diet and medical history together. NIH risk groups and symptoms.
What testing should establish
Testing review pending
A pending label means the product evidence review is unfinished. Manufacturer statements such as GMP, lab tested or Informed Sport are separate from verified evidence for the relevant product and batch.
What useful evidence would show
Look for a report identifying the exact product and batch, elemental zinc and any claimed copper amount, analytical methods and relevant contaminant results. A logo or a generic factory certificate is not interchangeable with a product-specific report.
Why the scores are provisional
Testing contributes no score while excluded. The shared display uses clean rounded weights, while the total is calculated consistently by the central scoring helper. This prevents missing research being presented as either a pass or a failure.
Zinc blood tests: what results can and cannot tell you
What is measured
A zinc blood test generally measures zinc in serum or plasma; UK labs commonly report µmol/L. It is a circulating concentration, not a complete inventory of body zinc. Use the supplied lab interval and clinical context. Liverpool laboratory guidance.
Why one result is limited
Inflammation and low albumin can lower circulating zinc. Sampling conditions matter; some labs prefer fasting samples. A low result alone cannot set a supplement dose. Bolton laboratory handbook.
A useful clinical question
Testing may help investigate a suspected deficiency or monitor a prescribed regimen when interpreted with symptoms, diet and other results. It is not a universal screening requirement before buying a supplement. Discuss whether testing would change management before choosing a blood test.
Testing evidence in this comparison
A testing claim is not the same as a verified report. No public evidence located does not mean a product has not been tested.
Testing review pending0
Recognised certification2
Verified independent evidence1
Manufacturer COA0
Testing claimed12
No public evidence located8
What does zinc cost?
Current UK comparison set, based on the daily serving shown on each label.
£0.02Lowest daily cost
£0.09Median daily cost
£0.44Highest daily cost
Price insights
Shown only where the underlying product data is reliable.
There is no single extra supplement dose for everyone. Use the UK dietary, labelling and safety references in the dose guide, then consider food, other supplements and any clinical advice. The coloured bands are comparison context.
Is 50mg zinc suitable every day?
It is in our high-dose band and above NHS general supplement advice. Read the copper and duration cautions in the safety section; the presence of copper does not remove them.
Is zinc picolinate better than bisglycinate?
A form name or uptake claim does not establish superior outcomes for every user. Compare elemental amount, ingredient clarity, serving and cost; neither form earns an automatic premium.
Do I need copper with zinc?
Not necessarily. Copper inclusion is a formulation choice that needs the context of zinc dose, duration and total diet. An undisclosed amount is not zero, and no universal ratio is endorsed here.
Do zinc lozenges prevent colds?
The review summarised above found little or no prevention benefit. A possible reduction in duration during treatment has important uncertainty and formulation differences. Daily supplements are not interchangeable with trial regimens.
Can zinc boost testosterone?
Meeting zinc needs supports normal nutrition. The small zinc-sufficient study above did not show a testosterone increase; this page does not recommend zinc as a general testosterone booster.
Can I take zinc with vitamin C?
Several products combine them. Check both amounts and other products in your stack; a combination label does not itself prove better results.
Why are some products missing from the table?
Products are held for review when core amounts, co-actives or a fixed adult daily serving need clarification. As-needed short courses are not averaged into an invented daily regimen.
Why is the testing score pending?
Detailed product testing research is a separate review. The comparison does not turn unreviewed evidence into “no public evidence” or a verified badge.
