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Klean Athlete
Klean Athlete is a sport line built around banned-substance testing. The NSF Certified for Sport search returned creatine, protein, omega-3, vitamin D, iron, zinc, magnesium, collagen, and a multivitamin, among other formulas.
Checked 15 October 2026. 52 products below. Programs: NSF Certified for Sport. A seal applies to the named product, not to every bottle this brand sells. Lists change; use the certifier link before you treat a seal as current.
Which certifications, and where to recheck them
- NSF Certified for Sport — These names appeared in the NSF Certified for Sport product search on 15 October 2026. Products not named here were not on that search result.
Products on the official list
Supplement pages
These links go to the ingredient pages, which describe the evidence. The certification above is about the named product, not about whether the ingredient works.
- Creatine monohydrate
- Ashwagandha (KSM-66)
- Iron
- B-complex (balanced)
- BCAAs (standalone)
- Calcium
- Casein protein
- Collagen peptides
- Vitamin D3
- Omega-3 (EPA/DHA)
- Electrolyte complex (Na/K/Mg)
- Glutamine (standalone, healthy adults)
- Multivitamins (healthy adults)
- Magnesium
- Melatonin
- Probiotics
- Zinc
Other checked brands
- Thorne NSF Certified for Sport
- Momentous NSF Certified for Sport, Informed Sport
- Nordic Naturals NSF Certified for Sport
- Designs for Sport NSF Certified for Sport
- Transparent Labs NSF Certified for Sport
- Bulk Supplements NSF Certified for Sport
Full verified-brands directory · What these seals do and do not mean