Dr. Mercola Niacin Vitamin B3, 50 mg, 270 Tablets supplement bottle
Dr. Mercola

Niacin Vitamin B3, 50 mg, 270 Tablets

What We Researched
1 active ingredient analyzed · 7 inactive ingredients decoded · 4 brand certifications checked · 2 retailers compared · Last updated: Mar 2026
93
Product Score Excellent
81
Brand Score Good

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

  • Microcrystalline Cellulose
  • Silicon Dioxide
  • Rice Bran Extract
  • Rice Hull
  • Gum Acacia
  • Sunflower Oil
  • Organic tablet coating (organic tapioca maltodextrin, organic sunflower lecithin, organic palm oil, 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.

Microcrystalline Cellulose Safe

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

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Rice Bran Extract Generally_safe
Rice Hull Generally_safe

It is added to improve powder flow during manufacturing.

Gum Acacia Safe

It is used as a thickener, binder, or emulsifier.

Sunflower Oil Safe

Helps dissolve and absorb fat-soluble vitamins.

Organic tablet coating (organic tapioca maltodextrin, organic sunflower lecithin, organic palm oil, organic guar gum) Unknown

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$27$26$25$24$23 Mar 12 $24.99
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
Dr. Mercola

Founded 1997 · Cape Coral, Florida, USA · 209 products · mercola.com/

Certifications

4 certifications
Consumerlab Verified Source
Nsf Gmp Verified Source
Usda Organic Verified Source
Fda Gmp Inspections Verified Source

Transparency

2 claims
Third Party Testing Claim — Verified Source

Violation History

7 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
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Frequently Asked Questions
Is Dr. Mercola Niacin Vitamin B3, 50 mg a good supplement?

Dr. Mercola Niacin Vitamin B3, 50 mg, 270 Tablets 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 7 inactive ingredients, 4 are rated safe and 0 are flagged for review. The manufacturer, Dr. Mercola, holds a brand trust score of 81/100 with 4 verified certifications including Consumerlab, Nsf Gmp, Usda Organic, Fda Gmp Inspections.

What are the ingredients in Dr. Mercola Niacin Vitamin B3, 50 mg?

Dr. Mercola Niacin Vitamin B3, 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 Niacin Vitamin B3, 50 mg safe to take?

Dr. Mercola Niacin Vitamin B3, 50 mg, 270 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 Dr. Mercola a trustworthy supplement brand?

Dr. Mercola receives a brand trust score of 81/100 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 209 products in their lineup. They hold 4 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 7 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.