Rugby Niacin, 500 mg Extended Release supplement bottle
Rugby

Niacin, 500 mg Extended Release

What We Researched
1 active ingredient analyzed · 1 retailer compared · Last updated: Mar 2026
81
Product Score Good

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Niacin 500 mg
Bioavailability Excellent

Absorption Rating

  • Niacin Good
Other Ingredients Fair

Fillers & Additives

No inactive ingredient data available.

Efficacy Very Good

Dosage Analysis

  • Niacin 500 mg High

Supplement Facts

Ingredient Amount % Daily Value
Niacin 500 mg

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
Rugby

Founded 1961 · Livonia, Michigan, USA · 135 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 Niacin, 500 mg Extended Release a good supplement?

Rugby Niacin, 500 mg Extended Release received a product quality score of 81/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 1 active ingredients

What are the ingredients in Rugby Niacin, 500 mg Extended Release?

Rugby Niacin, 500 mg Extended Release contains 1 active ingredients: Niacin (500 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Rugby Niacin, 500 mg Extended Release safe to take?

Rugby Niacin, 500 mg Extended Release 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 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.