Dr. Mercola Niacinamide Vitamin B3 Non-Flushing 50 mg supplement bottle
Dr. Mercola

Niacinamide Vitamin B3 Non-Flushing 50 mg Review

What We Researched
1 active ingredient analyzed · 8 inactive ingredients decoded · 6 brand certifications checked · Last updated: Aug 2026
93
Product Score Excellent
86
Brand Score Good

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
Niacin (Vitamin B3) 50 mg 313%
Bioavailability Excellent

Absorption Rating

  • Niacin (Vitamin B3) Good
Other Ingredients Excellent

Fillers & Additives

  • Sunflower Oil
  • Microcrystalline Cellulose
  • Ascorbyl Palmitate
  • Sunflower Lecithin
  • Tapioca Maltodextrin
  • Guar Gum
  • Bamboo Extract
  • Organic Guar Gum
Efficacy Very Good

Dosage Analysis

  • Niacin (Vitamin B3) 50 mg High

Supplement Facts

Ingredient Amount % Daily Value
Niacin (Vitamin B3) 50 mg 313%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Sunflower Oil Safe

Helps dissolve and absorb fat-soluble vitamins.

Microcrystalline Cellulose Safe

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

Ascorbyl Palmitate Safe

Prevents oxidation and extends shelf life of oil-based supplements.

Sunflower Lecithin Safe

Helps mix oil and water-based ingredients. Allergen-free alternative to soy lecithin.

Tapioca Maltodextrin Generally_safe

It is used as a filler or binder.

Guar Gum Safe

Thickens and provides fiber in supplement formulations.

Bamboo Extract Generally_safe

It may be used as a source of silica or for its antioxidant properties.

Organic Guar Gum Generally_safe

It is used to thicken liquids and stabilize mixtures.

Brand Trust Report
Dr. Mercola

Founded 1997 · Cape Coral, Florida, USA · 319 products · mercola.com/

Certifications

6 certifications
Consumerlab Verified Source
Nsf Gmp Verified Source
Usda Organic Verified Source
Fda Gmp Inspections Verified Source
NSF Certified for Sport Verified
NSF Contents Certified Verified

Transparency

3 claims
Third Party Testing Claim — Verified Source
Contains Proprietary Blend — True

Violation History

8 incidents
Prop 65 Lead2025-04-18Source
Lawsuit Wrongful termination and breach of a severance contract by the former CEO.2024Source
Fda Warning Unapproved and misbranded products related to Coronavirus Disease 2019 (COVID-19).2021-02-18Source
Lawsuit False and unsupported claims that its indoor tanning systems are safe and do not increase the risk of skin cancer.2016Source
Fda Warning Illegal marketing of a medical device.2011-01-01Source
Fda Warning Illegal drug claims for various supplements.2006-01-01Source
Fda Warning Illegal drug claims for various supplements.2005-01-01Source
Fda Warning Letter FDA Warning LetterSource
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Frequently Asked Questions
Is Dr. Mercola Niacinamide Vitamin B3 Non-Flushing 50 mg a good supplement?

Dr. Mercola Niacinamide Vitamin B3 Non-Flushing 50 mg 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 270 servings per container. Of the 8 inactive ingredients, 5 are rated safe and 0 are flagged for review. The manufacturer, Dr. Mercola, holds a brand trust score of 86/100 with 6 verified certifications including Consumerlab, Nsf Gmp, Usda Organic, Fda Gmp Inspections.

What are the ingredients in Dr. Mercola Niacinamide Vitamin B3 Non-Flushing 50 mg?

Dr. Mercola Niacinamide Vitamin B3 Non-Flushing 50 mg contains 1 active ingredients: Niacin (Vitamin B3) (50 mg). Notable high-dose ingredients include Niacin at 313% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Dr. Mercola Niacinamide Vitamin B3 Non-Flushing 50 mg safe to take?

Dr. Mercola Niacinamide Vitamin B3 Non-Flushing 50 mg 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 Dr. Mercola a trustworthy supplement brand?

Dr. Mercola receives a brand trust score of 86/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1997 and headquartered in Cape Coral, Florida, USA, the company offers 319 products in their lineup. They hold 6 verified certifications including Consumerlab, Nsf Gmp, Usda Organic, Fda Gmp Inspections. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Dr. Mercola has 8 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 150,000 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 — 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.