Klean Athlete supplements: what each label shows
Checked 25 October 2026 · labels from NIH's public label database, January 2026 release
The short answer
NIH lists 52 Klean Athlete labels, which make up 51 products. 49 of them are third-party tested, and 51 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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49 of 51 products are third-party tested
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51 of 51 contain none of the additives we check for
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5 of the 5 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
Klean Athlete 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 Klean Creatine
Third-party tested: NSF Certified for Sport- None of the additives we check for
- Form: Creatine monohydrate
An expert prefers this form See the quote
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Image: NIH label database Klean Magnesium
- Third-party tested: NSF Certified for Sport
- None of the additives we check for
- Form: Magnesium glycinate
An expert prefers this form See the quote
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Image: NIH label database Klean Iron
- Third-party tested: NSF Certified for Sport
- None of the additives we check for
- Form: Ferronyl carbonyl iron
An expert prefers this form See the quote
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Image: NIH label database Klean-D 125 mcg (5,000 IU)
- Third-party tested: NSF Certified for Sport
- None of the additives we check for
- Form: Vitamin D3 (cholecalciferol)
An expert prefers this form See the quote
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Image: NIH label database Klean-D 25 mcg (1,000 IU)
- Third-party tested: NSF Certified for Sport
- None of the additives we check for
- Form: Vitamin D3 (cholecalciferol)
An expert prefers this form See the quote
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Image: NIH label database -
Image: NIH label database -
Image: NIH label database -
Image: NIH label database -
Image: NIH label database -
Image: NIH label database -
Generic image, not this product
Every Klean Athlete product
Creatine
Every brand's creatine, checked
| Product | Amount | Third-party tested | Additives | Form | Label |
|---|---|---|---|---|---|
| Klean Creatine | 5 g per 5 grams | Third-party tested: NSF Certified for Sport | None of the additives we check for | Form: Creatine monohydrateAn expert prefers this form See the quote | label |
Iron
| Product | Amount | Third-party tested | Additives | Form | Label |
|---|---|---|---|---|---|
| Klean Iron | 27 mg per 1 tablet | Third-party tested: NSF Certified for Sport | None of the additives we check for | Form: Ferronyl carbonyl ironAn expert prefers this form See the quote | label |
Magnesium
Every brand's magnesium, checked
| Product | Amount | Third-party tested | Additives | Form | Label |
|---|---|---|---|---|---|
| Klean Magnesium | 120 mg per 1 vegetarian capsules | Third-party tested: NSF Certified for Sport | None of the additives we check for | Form: Magnesium glycinateAn expert prefers this form See the quote | label |
Vitamin D
Every brand's vitamin D, checked
| Product | Amount | Third-party tested | Additives | Form | Label |
|---|---|---|---|---|---|
| Klean-D 125 mcg (5,000 IU) | 125 mcg per 1 tablet | Third-party tested: NSF Certified for Sport | None of the additives we check for | Form: Vitamin D3 (cholecalciferol)An expert prefers this form See the quote | label |
| Klean-D 25 mcg (1,000 IU) | 25 mcg per 1 tablet | Third-party tested: NSF Certified for Sport | None of the additives we check for | Form: Vitamin D3 (cholecalciferol)An expert prefers this form See the quote | label |
Zinc
Other products
| Product | Amount | Third-party tested | Additives | Form | Label |
|---|---|---|---|---|---|
| Klean Antioxidant | Third-party tested: NSF Certified for Sport | None of the additives we check for | label | ||
| Klean B-Complex | Third-party tested: NSF Certified for Sport | None of the additives we check for | label | ||
| Klean BCAA + Peak ATP Orange Flavor | Third-party tested: NSF Certified for Sport | None of the additives we check for | label | ||
| Klean Casein Natural Vanilla Custard Flavor | Third-party tested: NSF Certified for Sport | None of the additives we check for | label | ||
| Klean Collagen+C Natural Berry Flavor | Third-party tested: NSF Certified for Sport | None of the additives we check for | Form: Hydrolyzed collagen | label | |
| Klean Collagen+C Natural Tropical Fruit Flavor | Third-party tested: NSF Certified for Sport | None of the additives we check for | Form: Hydrolyzed collagen | label | |
| Klean Collagen+C Unflavored | Third-party tested: NSF Certified for Sport | None of the additives we check for | Form: Hydrolyzed collagen | label | |
| Klean Electrolytes | Third-party tested: NSF Certified for Sport | None of the additives we check for | label | ||
| Klean Endurance | Third-party tested: NSF Certified for Sport | None of the additives we check for | label | ||
| Klean Endurance Natural Orange Vanilla Flavor | Third-party tested: NSF Certified for Sport | None of the additives we check for | label | ||
| Klean Essential Aminos+HMB Natural Orange Cream Flavor | Third-party tested: NSF Certified for Sport | None of the additives we check for | label | ||
| Klean Focus | Third-party tested: NSF Certified for Sport | None of the additives we check for | label | ||
| Klean Gummy Multivitamin Natural Raspberry-Lemonade Flavor 2 label versions | Third-party tested: NSF Certified for Sport | None of the additives we check for | 309479 259896 | ||
| Klean Hydration Natural Orange Flavor 4 label versions | Third-party tested: NSF Certified for Sport | None of the additives we check for | 243886 243889 237096 228582 | ||
| Klean Isolate 2 label versions | Third-party tested: NSF Certified for Sport | None of the additives we check for | 232880 14348 | ||
| Klean Isolate Natural Chocolate Flavor 3 label versions | Third-party tested: NSF Certified for Sport | None of the additives we check for | 243807 243801 237090 | ||
| Klean Isolate Natural Vanilla Flavor 3 label versions | Third-party tested: NSF Certified for Sport | None of the additives we check for | 243879 243813 237099 | ||
| Klean Joint & Muscle | Third-party tested: NSF Certified for Sport | None of the additives we check for | label | ||
| Klean Melatonin Natural Raspberry Lemonade Flavor | Third-party tested: NSF Certified for Sport | None of the additives we check for | label | ||
| Klean Multivitamin | Third-party tested: NSF Certified for Sport | None of the additives we check for | label | ||
| Klean Omega | Third-party tested: NSF Certified for Sport | None of the additives we check for | label | ||
| Klean Plant-Based Protein Natural Vanilla Flavor | Third-party tested: NSF Certified for Sport | None of the additives we check for | label | ||
| Klean Pre-Workout Natural Lemon Tea Flavor 4 label versions | Third-party tested: NSF Certified for Sport | None of the additives we check for | 259904 259898 243982 243793 | ||
| Klean Probiotic | Third-party tested: NSF Certified for Sport | None of the additives we check for | label | ||
| Klean Recovery Milk Chocolate Flavor 4 label versions | Third-party tested: NSF Certified for Sport | None of the additives we check for | 243950 243940 237100 57590 | ||
| Klean SR Beta-Alanine | Third-party tested: NSF Certified for Sport | None of the additives we check for | label | ||
| Klean-C Natural Strawberry-Orange Flavor | Third-party tested: NSF Certified for Sport | None of the additives we check for | label | ||
| Klean Calcium (Citrate) | No third-party test shown on the label | None of the additives we check for | Form: Calcium citrate | label | |
| Klean Glutamine | No third-party test shown on the label | None of the additives we check for | label |
Source: NIH's public label database, 11 January 2026 release; checks by Decode, 25 October 2026
What the badges on Klean Athlete labels mean
- NSF Certified for Sport49 products
An independent lab checked what's in it, and screened for banned substances.
Source: NIH's public label database, 11 January 2026 release; checks by Decode, 25 October 2026
Testing lab lists and FDA record
The testing labs' lists we read (BSCG, IFOS, IGEN, IKOS, Informed Choice, Informed Sport) name no Klean Athlete product.
No FDA recall, warning letter or health fraud listing on file.
Common questions
Is Klean Athlete third-party tested?
49 of 51 Klean Athlete 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 Klean Athlete?
If a label here is out of date, email [email protected] with the UPC. We check NIH's latest record and update the page.