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21st Century Zinc 50mg
Product analysis · 21st Century

21st Century Zinc 50mg

Amino acid chelate · Tablet

Why this score?
Testing & evidence
3/25
Ingredient/formulation quality
9/20
Value
20/20
Dose context & clarity
8/15
Manufacturer transparency
3/10
Label/ingredient transparency
10/10
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Testing transparency: 3/25
$8.57Amazon
TabletFormat
50 mgDaily dose
110 tabletsPack size
$0.08Price/day
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We may earn a commission from qualifying purchases. This never affects our scores.

The score, explained

Our scoring methodology
Testing & evidence12.8/100
3 points contributed · weighting 25
Ingredient/formulation quality45/100
9 points contributed · weighting 20
Value100/100
20 points contributed · weighting 20
Dose context & clarity50/100
8 points contributed · weighting 15
Manufacturer transparency30/100
3 points contributed · weighting 10
Label/ingredient transparency100/100
10 points contributed · weighting 10

The score compares product data, not medical effectiveness or individual suitability. Prime and affiliate commission contribute no points.

Testing & evidence

Testing claimed

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."
Laboratory
Not recorded
Certification body
Not recorded
Batch
Not recorded
Batch-specific report
Not established in this record
Report date
Not recorded
Evidence checked
2026-09-15 18:46:10

Dose & value

Zinc form
Amino acid chelateTablet
Serving size
1 tablet daily with a meal
Pack size
110 tablets
Servings per day
1
Price per day
$0.08
Price last checked
2026-09-15 12:46:32

Daily cost uses the recorded label serving; a larger dose earns no value advantage. The label serving is not a recommendation for your personal intake.

Zinc formulation details

Zinc comparison form
Amino acid chelate
Zinc compounds as disclosed
Amino acid chelate
Elemental zinc / serving (mg)
50
Elemental zinc / day (mg)
50
Compound mass / serving (mg), only if disclosed
Not disclosed
Copper included (yes / no / unknown)
no
Elemental copper / serving (mg)
Not disclosed
Copper printed in micrograms, if stated
Not disclosed
Elemental copper / day (mg)
Not disclosed
Copper form as disclosed
Not listed
Vitamin C included as active (yes / no / unknown)
no
Vitamin C / serving (mg)
Not disclosed
Pack size as labelled
110 tablets
Recommended serving / frequency
1 tablet daily with a meal
Comparison basis for a serving range
Not disclosed
Units / serving
1
Label use (daily / short_term / unknown)
daily
Maximum course days, if stated
Not disclosed
Other active ingredients
125mg calcium carbonate per tablet
Sugars / sweeteners
None listed
Flavour
Unflavored
Allergen statement
Gluten free
Vegan / vegetarian label status
Gluten-free, no added sugar/salt/yeast/preservatives/artificial flavors

Product sources & research notes

Listing and manufacturer details describe the label; they do not independently verify product claims. Check the current pack before use.

Ingredients & suitability

Excipients
Not disclosed — check the current label
Allergens
Gluten free
Carrier / source
Not disclosed — check the current label
Other active ingredients
125mg calcium carbonate per tablet

Manufacturer transparency

Brand
21st Century
Legal company
Not recorded
Manufacturing model
Not recorded
Manufacturing location
Not recorded

View the full brand profile →

What the record makes clear

  • Active amount is disclosed.
  • Daily cost can be calculated from the recorded serving.

What to keep in mind

  • Verify the current label and the batch covered by any testing report.
  • A product score cannot determine whether you need a supplement.

Explore the alternatives

Compare alternative

Nutricost Zinc Picolinate 50mg

Why this score?
Testing & evidence
21/25
Ingredient/formulation quality
17/20
Value
6/20
Dose context & clarity
8/15
Manufacturer transparency
9/10
Label/ingredient transparency
10/10
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.
Laboratory
Not recorded
Certification body
NSF Certified for Sport
Batch
Not recorded
Batch-specific report
Not established in this record
Report date
Not recorded
Evidence checked
2026-09-15 18:47:09
$0.15per day
$17.99per pack
View AnalysisBuy Nowon Amazon
Compare alternative

Thorne Zinc Picolinate 30mg (US)

Why this score?
Testing & evidence
21/25
Ingredient/formulation quality
17/20
Value
2/20
Dose context & clarity
11/15
Manufacturer transparency
6/10
Label/ingredient transparency
9/10
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’s own Certified for Sport listing confirms "Thorne® Zinc Picolinate 30 mg" with lot numbers and product details.
Laboratory
Not recorded
Certification body
NSF Certified for Sport
Batch
Not recorded
Batch-specific report
Not established in this record
Report date
Not recorded
Evidence checked
2026-09-15 18:51:31
$0.33per day
$20.00per pack
View AnalysisBuy Nowon Amazon
Compare alternative

NOW Foods Zinc Picolinate 50mg

Why this score?
Testing & evidence
3/25
Ingredient/formulation quality
17/20
Value
18/20
Dose context & clarity
8/15
Manufacturer transparency
9/10
Label/ingredient transparency
10/10
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
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.”
Laboratory
Not recorded
Certification body
Not recorded
Batch
Not recorded
Batch-specific report
Not established in this record
Report date
Not recorded
Evidence checked
2026-09-16 18:21:20
$0.09per day
$5.69per pack
View AnalysisBuy Nowon Amazon