Natural Factors K & D Plus A supplement bottle
Natural Factors

K & D Plus A Review

What We Researched
3 active ingredients analyzed · 5 inactive ingredients decoded · 5 brand certifications checked · Last updated: Aug 2026
91
Product Score Excellent
100
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 A (as Pacific Halibut Liver Oil, Vitamin A Palmitate) 1000 IU 20%
Vitamin D3 (as Cholecalciferol) 1000 IU 250%
Vitamin K2 (as Menaquinone) 120 mcg 150%
Bioavailability Excellent

Absorption Rating

  • Vitamin A (as Pacific Halibut Liver Oil, Vitamin A Palmitate) Good
  • Vitamin D3 (as Cholecalciferol) Good
  • Vitamin K2 (as Menaquinone) Good
Other Ingredients Excellent

Fillers & Additives

  • Organic Flaxseed Oil
  • Softgel
  • Yellow Beeswax
  • Non-GMO Sunflower Lecithin
  • Vitamin E
Efficacy Good

Dosage Analysis

  • Vitamin A (as Pacific Halibut Liver Oil, Vitamin A Palmitate) 1000 IU Under-dosed
  • Vitamin D3 (as Cholecalciferol) 1000 IU Effective
  • Vitamin K2 (as Menaquinone) 120 mcg Effective

Supplement Facts

Ingredient Amount % Daily Value
Vitamin A (as Pacific Halibut Liver Oil, Vitamin A Palmitate) 1000 IU 20%
Vitamin D3 (as Cholecalciferol) 1000 IU 250%
Vitamin K2 (as Menaquinone) 120 mcg 150%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Organic Flaxseed Oil Safe

It is included for its nutritional value and potential health benefits.

Softgel Unknown
Yellow Beeswax Safe

Helps form and seal softgel capsules.

Non-GMO Sunflower Lecithin Safe

It is used as an emulsifier to help mix ingredients.

Vitamin E Generally_safe

It is added to supplements as a source of vitamin E.

Brand Trust Report
Natural Factors

Founded 1950 · Coquitlam, British Columbia, Canada · 832 products · naturalfactors.com

Certifications

5 certifications
B Corp Certified Verified Source
Usp Verified Verified Source
Fda Gmp Inspections Verified Source
Non Gmo Project Verified Source
Usda Organic Verified Source

Transparency

4 claims
Third Party Testing Claim — Verified Source
Testing Lab Disclosure — Verified Source
In House Testing — Verified Source

Violation History

5 incidents
Prop 65 Lead2025-10-31Source
Recall Hi Potency B Complex, RevitalX, Super Multi® IRON FREE2024-07-19Source
Lawsuit Products labeled as containing glucosamine sulfate did not contain the ingredient.2021Source
Prop 65 Lead2016-01-13Source
Recall Natural Factors L-Arginine 500mg2006-04-05Source
Related Supplements
Frequently Asked Questions
Is Natural Factors K & D Plus A a good supplement?

Natural Factors K & D Plus A received a product quality score of 91/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 3 active ingredients Of the 5 inactive ingredients, 3 are rated safe and 0 are flagged for review. The manufacturer, Natural Factors, holds a brand trust score of 100/100 with 5 verified certifications including B Corp Certified, Usp Verified, Fda Gmp Inspections, Non Gmo Project.

What are the ingredients in Natural Factors K & D Plus A?

Natural Factors K & D Plus A contains 3 active ingredients: Vitamin A (as Pacific Halibut Liver Oil, Vitamin A Palmitate) (1000 IU), Vitamin D3 (as Cholecalciferol) (1000 IU), Vitamin K2 (as Menaquinone) (120 mcg). Notable high-dose ingredients include Vitamin D3 at 250% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Natural Factors K & D Plus A safe to take?

Natural Factors K & D Plus A 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 Natural Factors a trustworthy supplement brand?

Natural Factors receives a brand trust score of 100/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1950 and headquartered in Coquitlam, British Columbia, Canada, the company offers 832 products in their lineup. They hold 5 verified certifications including B Corp Certified, Usp Verified, Fda Gmp Inspections, Non Gmo Project. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Natural Factors has 5 historical regulatory incidents on record, which are factored into the trust score.

Scan Any Supplement Instantly

Download GoodSupp to scan barcodes, check ingredient safety, and find the best supplements for your needs.

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.