Rugby Niacinamide 500 mg supplement bottle
Rugby

Niacinamide 500 mg Review

What We Researched
1 active ingredient analyzed · 6 inactive ingredients decoded · Last updated: Aug 2026
93
Product Score Excellent
Brand Score Not rated yet

Product score from label analysis. Rugby hasn't completed our brand research yet. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Niacin (as Niacinamide) 500 mg 2500%
Bioavailability Excellent

Absorption Rating

  • Niacin (as Niacinamide) Good
Other Ingredients Excellent

Fillers & Additives

  • Microcrystalline Cellulose
  • Lactose
  • Stearic Acid
  • Magnesium Silicate
  • Croscarmellose Sodium
  • Silica
Efficacy Very Good

Dosage Analysis

  • Niacin (as Niacinamide) 500 mg High

Supplement Facts

Ingredient Amount % Daily Value
Niacin (as Niacinamide) 500 mg 2500%

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.

Lactose Generally_safe

It is used as a filler or binder.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Magnesium Silicate Generally_safe

It is used to improve powder flow and prevent clumping.

Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Brand Trust Report
Rugby

Founded 1961 · Livonia, Michigan, USA · 195 products · majorrugby.com/

Transparency

1 claim

Violation History

4 incidents
Recall All liquid products manufactured by PharmaTech LLC and distributed by Rugby Laboratories2017-08-10Source
Recall Rugby Natural Iron Supplement tablets2013-01-17Source
Recall Rugby Children's Pain & Fever Concentrated Drops (Acetaminophen Drops)2011-07-21Source
Lawsuit Failure to have an effective system to identify and report suspicious orders of controlled substances.2011Source
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Frequently Asked Questions
Is Rugby Niacinamide 500 mg a good supplement?

Rugby Niacinamide 500 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 Of the 6 inactive ingredients, 4 are rated safe and 0 are flagged for review.

What are the ingredients in Rugby Niacinamide 500 mg?

Rugby Niacinamide 500 mg contains 1 active ingredients: Niacin (as Niacinamide) (500 mg). Notable high-dose ingredients include Niacin at 2500% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Rugby Niacinamide 500 mg safe to take?

Rugby Niacinamide 500 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.

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.