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
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 also lists Thorne® Zinc Picolinate 30 mg as a certified product.
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
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 also lists Thorne® Zinc Picolinate 30 mg as a certified product.
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 site says: "From sourcing the finest ingredients to rigorous testing and production processes, we ensure that every product meets our stringent quality benchmarks" and "All our products undergo rigorous testing to ensure you are receiving the purity, potency and guaranteed quality labeled on each 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 ↓
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 also lists Thorne® Zinc Picolinate 30 mg as a certified product.
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’s own Certified for Sport listing confirms "Thorne® Zinc Picolinate 30 mg" with lot numbers and product details.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
NOW Foods’ COA page states: “A COA confirms that the product you purchased has gone through detailed testing and adheres to its product specifications and NOW standards.”
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: “Quality… We produce our products in small batches to maintain freshness and our strict standards go above and beyond Good Manufacturing Practice requirements set by the FDA.” Also: “Highly absorbable, premium form of Zinc” and “The Gold Standard for Vitamins and Supplements Since 1947.” These are marketing/quality statements, not independent verification of this product’s contents.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Life Extension’s quality FAQ says: “We are happy to provide a summary of the reports we receive from the contract manufacturers and the independent laboratories that test both our raw materials and final products. We can do this for every supplement…”
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
ConsumerLab news release states it "purchased and tested 15 popular zinc supplements" and that the review includes "Jarrow Formulas Zinc Balance" among the products tested; however, I did not access a public ConsumerLab product-specific pass/approval page for this exact product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Doctor's Best’s own product page says the product is "100% Chelated" and links a "High Absorption Zinc Fact Sheet." The brand’s science/partners pages also say "every product is backed by research" and that Albion minerals are "scientifically proven" to be more easily absorbed. I did not find an independently verifiable third-party COA or a certifying-body registry entry for this exact 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.
Manufacturer site says: "From sourcing the finest ingredients to rigorous testing and production processes, we ensure that every product meets our stringent quality benchmarks" and "All our products undergo rigorous testing to ensure you are receiving the purity, potency and guaranteed quality labeled on each 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 and retailer/manufacturer page show badges/claims such as “NSF” / “NSF Certified Gluten-Free” and “Non-GMO Project Verified,” but I did not independently verify this exact product in the certifier’s own registry during this session.
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.
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 also lists Thorne® Zinc Picolinate 30 mg as a certified product.
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’s own Certified for Sport listing confirms "Thorne® Zinc Picolinate 30 mg" with lot numbers and product details.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
NOW Foods’ COA page states: “A COA confirms that the product you purchased has gone through detailed testing and adheres to its product specifications and NOW standards.”
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: “Quality… We produce our products in small batches to maintain freshness and our strict standards go above and beyond Good Manufacturing Practice requirements set by the FDA.” Also: “Highly absorbable, premium form of Zinc” and “The Gold Standard for Vitamins and Supplements Since 1947.” These are marketing/quality statements, not independent verification of this product’s contents.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Life Extension’s quality FAQ says: “We are happy to provide a summary of the reports we receive from the contract manufacturers and the independent laboratories that test both our raw materials and final products. We can do this for every supplement…”
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
ConsumerLab news release states it "purchased and tested 15 popular zinc supplements" and that the review includes "Jarrow Formulas Zinc Balance" among the products tested; however, I did not access a public ConsumerLab product-specific pass/approval page for this exact product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Doctor's Best’s own product page says the product is "100% Chelated" and links a "High Absorption Zinc Fact Sheet." The brand’s science/partners pages also say "every product is backed by research" and that Albion minerals are "scientifically proven" to be more easily absorbed. I did not find an independently verifiable third-party COA or a certifying-body registry entry for this exact 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.
Manufacturer site says: "From sourcing the finest ingredients to rigorous testing and production processes, we ensure that every product meets our stringent quality benchmarks" and "All our products undergo rigorous testing to ensure you are receiving the purity, potency and guaranteed quality labeled on each 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 and retailer/manufacturer page show badges/claims such as “NSF” / “NSF Certified Gluten-Free” and “Non-GMO Project Verified,” but I did not independently verify this exact product in the certifier’s own registry during this session.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
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, explained
Start with the ingredient form, then compare the disclosed active amount and serving size.
Picolinate
Compare active content and the label serving for this form.
Citrate
Compare active content and the label serving for this form.
OptiZinc (zinc L-methionine sulfate)
Compare active content and the label serving for this form.
Bisglycinate (TRAACS)
Compare active content and the label serving for this form.
Gluconate
Compare active content and the label serving for this form.
Picolinate chelate
Compare active content and the label serving for this form.
Amino acid chelate
Compare active content and the label serving for this form.
Whole-food/brown rice chelate
Compare active content and the label serving for this form.
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 evidence0
Manufacturer COA0
Testing claimed9
No public evidence located3
What does zinc cost?
Current US comparison set, based on the daily serving shown on each label.
$0.08Lowest daily cost
$0.14Median daily cost
$0.43Highest daily cost
Price insights
Shown only where the underlying product data is reliable.
