Klean Athlete Klean-D - NSF Certified for Sport, 25 mcg (1000 IU), 100 Tablets supplement bottle
Klean Athlete

Klean-D - NSF Certified for Sport, 25 mcg (1000 IU), 100 Tablets

What We Researched
1 active ingredient analyzed · 3 inactive ingredients decoded · 3 brand certifications checked · 3 retailers compared · Last updated: Mar 2026
100
Product Score Excellent
87
Brand Score Good

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin D3 (as cholecalciferol) (1000 IU) 25 mcg 125%
Bioavailability Excellent

Absorption Rating

  • Vitamin D3 (as cholecalciferol) (1000 IU) Good
Other Ingredients Excellent

Fillers & Additives

  • Microcrystalline Cellulose
  • Stearic Acid
  • Vegetable Stearate and Silica
Efficacy Excellent

Dosage Analysis

  • Vitamin D3 (as cholecalciferol) (1000 IU) 25 mcg Effective

Supplement Facts

Ingredient Amount % Daily Value
Vitamin D3 (as cholecalciferol) (1000 IU) 25 mcg 125%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Microcrystalline Cellulose Safe

Adds bulk to small-dose supplements to make tablets/capsules a manageable size.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Vegetable Stearate and Silica Generally_safe

They are added to improve manufacturing by preventing ingredients from sticking to machinery and improving powder flow.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$15$14$13$12$11 Mar 12 $13.20
Vitacost

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
Klean Athlete

Founded 2012 · Pittsburgh, Pennsylvania, United States · 15 products · kleanathlete.com/

Certifications

3 certifications
Nsf Certified For Sport Verified Source
Fda Gmp Inspections Verified Source
Nsf Gmp Verified Source

Transparency

3 claims
Third Party Testing Claim — Verified Source
Testing Lab Disclosure — Verified Source
In House Testing — Verified Source
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Frequently Asked Questions
Is Klean Athlete Klean-D - NSF Certified for Sport, 25 mcg (1000 IU) a good supplement?

Klean Athlete Klean-D - NSF Certified for Sport, 25 mcg (1000 IU), 100 Tablets received a product quality score of 100/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 1 active ingredients with 100 servings per container. Of the 3 inactive ingredients, 2 are rated safe and 0 are flagged for review. The manufacturer, Klean Athlete, holds a brand trust score of 87/100 with 3 verified certifications including Nsf Certified For Sport, Fda Gmp Inspections, Nsf Gmp.

What are the ingredients in Klean Athlete Klean-D - NSF Certified for Sport, 25 mcg (1000 IU)?

Klean Athlete Klean-D - NSF Certified for Sport, 25 mcg (1000 IU) contains 1 active ingredients: Vitamin D3 (as cholecalciferol) (1000 IU) (25 mcg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Klean Athlete Klean-D - NSF Certified for Sport, 25 mcg (1000 IU) safe to take?

Klean Athlete Klean-D - NSF Certified for Sport, 25 mcg (1000 IU), 100 Tablets has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Klean Athlete a trustworthy supplement brand?

Klean Athlete receives a brand trust score of 87/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 2012 and headquartered in Pittsburgh, Pennsylvania, United States, the company offers 15 products in their lineup. They hold 3 verified certifications including Nsf Certified For Sport, Fda Gmp Inspections, Nsf Gmp. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. No regulatory violations or FDA warning letters were found in our research.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.