Klean Athlete Klean-D 5000 IU supplement bottle
Klean Athlete

Klean-D 5000 IU Review

What We Researched
1 active ingredient analyzed · 9 inactive ingredients decoded · 6 brand certifications checked · Last updated: Aug 2026
93
Product Score Excellent
98
Brand Score Excellent

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin D3 (cholecalciferol) 5000 IU 1,250%
Bioavailability Excellent

Absorption Rating

  • Vitamin D3 (cholecalciferol) Good
Other Ingredients Excellent

Fillers & Additives

  • Microcrystalline Cellulose
  • Croscarmellose Sodium
  • Calcium Carbonate
  • Hypromellose
  • Stearic Acid
  • Glycerin
  • Silica
  • Vegetable Stearate
  • Coating
Efficacy Very Good

Dosage Analysis

  • Vitamin D3 (cholecalciferol) 5000 IU High

Supplement Facts

Ingredient Amount % Daily Value
Vitamin D3 (cholecalciferol) 5000 IU 1,250%

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.

Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

Calcium Carbonate Safe

Acts as a filler and provides supplemental calcium.

Hypromellose Safe

Forms vegetarian capsule shells. Dissolves easily in the stomach.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Glycerin Safe

Retains moisture and helps dissolve ingredients in softgels and liquids.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Vegetable Stearate Safe

Prevents ingredients from sticking to equipment.

Coating Unknown
Brand Trust Report
Klean Athlete

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

Certifications

6 certifications
Nsf Certified For Sport Verified Source
Fda Gmp Inspections Verified Source
Nsf Gmp Verified Source
NSF Certified for Sport Verified
NSF Contents Certified Verified
NSF Certified Verified

Transparency

3 claims
Third Party Testing Claim — Verified Source
Testing Lab Disclosure — Verified Source
In House Testing — Verified Source
Related Supplements
Frequently Asked Questions
Is Klean Athlete Klean-D 5000 IU a good supplement?

Klean Athlete Klean-D 5000 IU received a product quality score of 93/100 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 9 inactive ingredients, 8 are rated safe and 0 are flagged for review. The manufacturer, Klean Athlete, holds a brand trust score of 98/100 with 6 verified certifications including Nsf Certified For Sport, Fda Gmp Inspections, Nsf Gmp, NSF Certified for Sport.

What are the ingredients in Klean Athlete Klean-D 5000 IU?

Klean Athlete Klean-D 5000 IU contains 1 active ingredients: Vitamin D3 (cholecalciferol) (5000 IU). Notable high-dose ingredients include Vitamin D3 at 1,250% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Klean Athlete Klean-D 5000 IU safe to take?

Klean Athlete Klean-D 5000 IU 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 98/100 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 6 verified certifications including Nsf Certified For Sport, Fda Gmp Inspections, Nsf Gmp, NSF Certified for Sport. 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 — read our methodology. 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.