Bronson Vitamin K2 + D3 supplement bottle
Bronson

Vitamin K2 + D3

What We Researched
2 active ingredients analyzed · 6 inactive ingredients decoded · 3 brand certifications checked · 1 retailer compared · Last updated: Mar 2026
86
Product Score Good
75
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin D3 25 mcg 125%
Vitamin K2 45 mcg
Bioavailability Excellent

Absorption Rating

  • Vitamin D3 Good
  • Vitamin K2 Good
Other Ingredients Excellent

Fillers & Additives

  • Microcrystalline Cellulose
  • Stearic Acid
  • Magnesium Stearate
  • Silicon Dioxide
  • Hydroxypropyl Methylcellulose
  • Polyethylene Glycol Low
Efficacy Fair

Dosage Analysis

  • Vitamin D3 25 mcg Effective
  • Vitamin K2 45 mcg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin D3 25 mcg 125%
Vitamin K2 45 mcg

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.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Hydroxypropyl Methylcellulose Safe

It is used as a coating for tablets and capsules.

Polyethylene Glycol Caution

It is used as a binder, coating agent, or to improve solubility.

Price Comparison

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

Brand Trust Report
Bronson

Founded 1960 · Hauppauge, NY, USA · 292 products · bronsonvitamins.com/

Certifications

3 certifications
Consumerlab Verified Source
Fda Gmp Inspections Verified Source
Usda Organic Verified Source

Transparency

3 claims
Third Party Testing Claim — Claimed Source
In House Testing — Verified Source

Violation History

4 incidents
Prop 65 Lead2024-08-25Source
Prop 65 Lead2013-01-22Source
Prop 65 Lead2012-03-08Source
Prop 65 Listed Chemical (not specified in snippet)2008-10-22Source
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Frequently Asked Questions
Is Bronson Vitamin K2 + D3 a good supplement?

Bronson Vitamin K2 + D3 received a product quality score of 86/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 2 active ingredients with 360 servings per container. Of the 6 inactive ingredients, 5 are rated safe and 1 are flagged for review. The manufacturer, Bronson, holds a brand trust score of 75/100 with 3 verified certifications including Consumerlab, Fda Gmp Inspections, Usda Organic.

What are the ingredients in Bronson Vitamin K2 + D3?

Bronson Vitamin K2 + D3 contains 2 active ingredients: Vitamin D3 (25 mcg), Vitamin K2 (45 mcg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Bronson Vitamin K2 + D3 safe to take?

Bronson Vitamin K2 + D3 has been analyzed for ingredient safety across all its components. Of 6 inactive ingredients, 5 are rated safe. 1 ingredient is flagged for review: Polyethylene Glycol. 'Caution' doesn't mean dangerous — it indicates the ingredient has some considerations worth being aware of, such as potential sensitivities or ongoing research. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Bronson a trustworthy supplement brand?

Bronson receives a brand trust score of 75/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1960 and headquartered in Hauppauge, NY, USA, the company offers 292 products in their lineup. They hold 3 verified certifications including Consumerlab, Fda Gmp Inspections, Usda Organic. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Bronson has 4 historical regulatory incidents on record, which are factored into the trust score.

How much vitamin d3 should i take daily?

The optimal dosage depends on your individual health needs, age, sex, and current nutrient levels. Recommended daily amounts are established by health authorities but may vary from therapeutic doses used in clinical research. It's important to check the Supplement Facts label for the exact amount per serving and compare it against the % Daily Value. Some supplements provide mega-doses well above the Daily Value, which may not be necessary and in some cases could be harmful — particularly for fat-soluble vitamins (A, D, E, K) that accumulate in the body. GoodSupp's efficacy analysis evaluates whether a product's dosages align with clinically studied amounts. Always consult your healthcare provider for personalized dosage recommendations.

What does vitamin d do?

This is an important question for supplement consumers. The dietary supplement industry is largely self-regulated, which means product quality, ingredient transparency, and safety practices vary significantly between brands and products. The most reliable way to evaluate any supplement is to check for third-party testing certifications, review the full ingredient list and dosages, and research the brand's regulatory track record. GoodSupp's database of over 250,000 analyzed products provides independent quality scores, ingredient safety ratings, and brand trust reports to help you make evidence-based decisions.

How much vitamin d3 per day for a woman?

The optimal dosage depends on your individual health needs, age, sex, and current nutrient levels. Recommended daily amounts are established by health authorities but may vary from therapeutic doses used in clinical research. It's important to check the Supplement Facts label for the exact amount per serving and compare it against the % Daily Value. Some supplements provide mega-doses well above the Daily Value, which may not be necessary and in some cases could be harmful — particularly for fat-soluble vitamins (A, D, E, K) that accumulate in the body. GoodSupp's efficacy analysis evaluates whether a product's dosages align with clinically studied amounts. Always consult your healthcare provider for personalized dosage recommendations.

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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.