Kirkland Signature supplements: what each label shows
Checked 25 October 2026 · labels from NIH's public label database, January 2026 release
The short answer
NIH lists 44 Kirkland Signature labels, which make up 43 products. 28 of them are third-party tested, and 32 contain none of the additives we check for.
Source: NIH's public label database, 11 January 2026 release; checks by Decode, 25 October 2026
At a glance
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28 of 43 products are third-party tested
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32 of 43 contain none of the additives we check for
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4 of the 7 with an expert quote on form use a preferred form
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No FDA recall, warning letter or health fraud listing on file
Source: NIH's public label database, 11 January 2026 release; checks by Decode, 25 October 2026
Kirkland Signature products that are third-party tested
Ordered by checks passed, then by the amount on the label.
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Image: NIH label database B12 5000 mcg Cherry Flavor
Third-party tested: USP Verified- None of the additives we check for
- Form: Methylcobalamin
An expert prefers this form See the quote
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Image: NIH label database D3 50 mcg (2000 IU)
- Third-party tested: USP Verified
- None of the additives we check for
- Form: Vitamin D3
An expert prefers this form See the quote
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Generic image, not this product Extra Strength Vitamin D3 2000 IU
- Third-party tested: USP Verified
- None of the additives we check for
- Form: Vitamin D3
An expert prefers this form See the quote
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Image: NIH label database Fish Oil 1200 mg
- Third-party tested: USP Verified
- None of the additives we check for
- Form: Fish oil (ethyl ester)
An expert spoke against this form See the quote
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Image: NIH label database Calcium Citrate Magnesium and Zinc
- Third-party tested: USP Verified
- None of the additives we check for
- Form
Experts disagree on this form See the quotes
-
Image: NIH label database -
Image: NIH label database -
Generic image, not this product -
Generic image, not this product -
Image: NIH label database -
Image: NIH label database -
Generic image, not this product
Every Kirkland Signature product
Fish oil
Every brand's fish oil, checked
| Product | Amount | Third-party tested | Additives | Form | Label |
|---|---|---|---|---|---|
| Fish Oil 1200 mg | 1,200 mg per 1 softgel | Third-party tested: USP Verified | None of the additives we check for | Form: Fish oil (ethyl ester)An expert spoke against this form See the quote | label |
| Krill Oil 500 mg | 500 mg per 1 softgel | No third-party test shown on the label | None of the additives we check for | Form: Phospholipid-form (krill oil / salmon roe) for brain DHAAn expert prefers this form See the quote | label |
Magnesium
Every brand's magnesium, checked
| Product | Amount | Third-party tested | Additives | Form | Label |
|---|---|---|---|---|---|
| Calcium Citrate Magnesium and Zinc | 80 mg per 2 tablets | Third-party tested: USP Verified | None of the additives we check for | FormExperts disagree on this form See the quotes | label |
| Magnesium Citrate 250 mg | 125 mg per 2 softgels | No third-party test shown on the label | Contains: Titanium dioxide | Form: Magnesium citrateExperts disagree on this form See the quotes | label |
Vitamin B12
Every brand's vitamin B12, checked
| Product | Amount | Third-party tested | Additives | Form | Label |
|---|---|---|---|---|---|
| B12 5000 mcg Cherry Flavor | 5,000 mcg per 1 tablet | Third-party tested: USP Verified | None of the additives we check for | Form: MethylcobalaminAn expert prefers this form See the quote | label |
Vitamin D
Every brand's vitamin D, checked
| Product | Amount | Third-party tested | Additives | Form | Label |
|---|---|---|---|---|---|
| D3 50 mcg (2000 IU) | 50 mcg per 1 soft gels | Third-party tested: USP Verified | None of the additives we check for | Form: Vitamin D3An expert prefers this form See the quote | label |
| Extra Strength Vitamin D3 2000 IU | 2,000 IU per 1 softgel | Third-party tested: USP Verified | None of the additives we check for | Form: Vitamin D3An expert prefers this form See the quote | label |
Other products
| Product | Amount | Third-party tested | Additives | Form | Label |
|---|---|---|---|---|---|
| Adult Multivitamin Gummies | Third-party tested: USP Verified | None of the additives we check for | label | ||
| C 1000 mg | Third-party tested: USP Verified | None of the additives we check for | label | ||
| C 250 mg Tangerine | Third-party tested: USP Verified | None of the additives we check for | label | ||
| Calcium 500 mg with D3 Adult Gummies | Third-party tested: USP Verified | None of the additives we check for | label | ||
| Calcium 600 mg | Third-party tested: USP Verified | None of the additives we check for | label | ||
| Calcium 600 mg with Vitamin D3 | Third-party tested: USP Verified | None of the additives we check for | label | ||
| CoQ10 300 mg | Third-party tested: USP Verified | None of the additives we check for | label | ||
| Daily Multi Vitamins & Minerals | Third-party tested: USP Verified | None of the additives we check for | label | ||
| E 180 mg (400 IU) | Third-party tested: USP Verified | None of the additives we check for | label | ||
| Extra Strength Glucosamine 1500 mg Chondroitin 1200 mg 2 label versions | Third-party tested: USP Verified | None of the additives we check for | 275998 207402 | ||
| Extra Strength Glucosamine HCl 1500 mg with MSM 1500 mg | Third-party tested: USP Verified | None of the additives we check for | label | ||
| Glucosamine 1500 mg Chondroitin 1200 mg | Third-party tested: USP Verified | None of the additives we check for | label | ||
| Glucosamine HCl 1500 mg with MSM 1500 mg | Third-party tested: USP Verified | None of the additives we check for | label | ||
| Performance Multi Energy Formula | Third-party tested: USP Verified | None of the additives we check for | label | ||
| Super B-Complex with Electrolytes 2 label versions | Third-party tested: USP Verified | None of the additives we check for | 276000 62678 | ||
| Active Vitamin Pack | Third-party tested: USP Verified | Contains: Hydrogenated oil, Titanium dioxide, Artificial coloring | label | ||
| Calcium 600 mg + D3 | Third-party tested: USP Verified | Contains: Titanium dioxide, Artificial coloring | label | ||
| Calcium 600 mg with Vitamin D3 | Third-party tested: USP Verified | Contains: Titanium dioxide, Artificial coloring | label | ||
| Calcium Citrate with 500 mg of Calcium | Third-party tested: USP Verified | Contains: Titanium dioxide | label | ||
| Chewable C 500 mg Tangy Orange Taste | Third-party tested: USP Verified | Contains: Artificial coloring | label | ||
| Energy B-Complex Adult Gummies | No third-party test shown on the label | None of the additives we check for | label | ||
| Fast Acting Lactase | No third-party test shown on the label | None of the additives we check for | label | ||
| Fiber Capsules | No third-party test shown on the label | None of the additives we check for | label | ||
| Ocusight Adult 50+ | No third-party test shown on the label | None of the additives we check for | label | ||
| Optifiber 2 label versions | No third-party test shown on the label | None of the additives we check for | 276001 75897 | ||
| Organic Multivitamin | No third-party test shown on the label | None of the additives we check for | label | ||
| Sugar Free Children's chewable | Third-party tested: USP Verified | Contains: Artificial coloring | label | ||
| Turmeric 1000 mg | No third-party test shown on the label | None of the additives we check for | Form: Turmeric root extract | label | |
| Ubiquinol 200 mg | No third-party test shown on the label | None of the additives we check for | label | ||
| Calcium Chews Chocolate Flavored | No third-party test shown on the label | Contains: Hydrogenated oil | label | ||
| Hair, Skin & Nails Strawberry Cream Flavored Coating | No third-party test shown on the label | Contains: Titanium dioxide | label | ||
| Triple Action Joint Health | No third-party test shown on the label | Contains: Titanium dioxide | label | ||
| Ultra Strength Antacid Calcium Carbonate 1000 mg Assorted Berry Flavors | No third-party test shown on the label | Contains: Artificial coloring | label |
Source: NIH's public label database, 11 January 2026 release; checks by Decode, 25 October 2026
What the badges on Kirkland Signature labels mean
- USP Verified28 products
An independent lab checked what's in it, and that the label is true.
- Origin4 products
It tells you where this was made or packed.
- Says tested4 products
The label says it was tested but doesn't say by whom. With no tester named, the label gives you no report to look up.
- Farming certified2 products
A farming label. It covers how the ingredients were grown or caught, like organic or non-GMO.
Source: NIH's public label database, 11 January 2026 release; checks by Decode, 25 October 2026
Testing lab lists and FDA record
- Informed Choice lists 1 product · Seals and lab results
Source: Informed Choice list, checked 23 October 2026
No FDA recall, warning letter or health fraud listing on file.
Common questions
Is Kirkland Signature third-party tested?
28 of 43 Kirkland Signature products are third-party tested. The rest show none on the label, and no testing lab's list we read names them.
Does no seal mean a product failed a test?
No. It means the label shows no third-party test, and no testing lab's list we read (BSCG, IFOS, IGEN, IKOS, Informed Choice, Informed Sport) names the product. A brand can test privately. This page shows what the label and the lists show.
Where does the label data come from?
The NIH Dietary Supplement Label Database, which is public domain. We read the file dated 11 January 2026. Brands change labels, so check the one you have.
Our method
- Third-party tested
- A seal from an outside lab that tests what is inside, printed on the label, or the product's name on that lab's own list.
- Additives
- Each other ingredient on the label, checked for artificial coloring, titanium dioxide, hydrogenated oil and BHA/BHT preservative, after a physician spoke against dyes, fillers and preservatives on video.
“…that are at the right Doses and that are effective and that don't have a lot of additives and fillers and preservatives and chemicals and dyes”
- Form
- The form printed on the label. When an expert we quote has talked about that form, the speech bubble next to it says where they stand. Open it to see what they said.
- One product, many labels
- Label versions that share a UPC count as one product. The newest label is the one shown.
- Dose
- The amount is shown as printed. Whether it suits you depends on your blood test.
Are you Kirkland Signature?
If a label here is out of date, email [email protected] with the UPC. We check NIH's latest record and update the page.