🟡 60/100

Review before taking

  • Niacin: 500mg is 14.3× the Tolerable Upper Intake Level (35mg)
  • 100% of ingredients have research evidence
C Label Compliance Grade

Product Label

📸

Have a supplement label? Find it here.

Upload a photo of any supplement label to search our database of 92,312 products.

Safety Alerts

⚠️ Niacin: 500mg is 14.3× the Tolerable Upper Intake Level (35mg)

The safety score is low because the 500mg dose of niacin is more than 14 times higher than the recommended maximum daily limit of 35mg.

Label Data

1 Tablet(s) Serving Size
100 Servings
Vitamin Product Type
100% Evidence Coverage

Supplement Facts — Evidence Check

500 mg (3125% DV)
⚠️ Exceeds Tolerable Upper Intake Level by 14.3× (UL: 35 mg) 📚 193 studies (Tier A: 5, B: 63)
RDA 14mg This product: 500mg UL 35mg

Other Ingredients

Cellulose Hydroxypropyl Methylcellulose Stearic Acid Magnesium Silicate Magnesium Stearate Polyethylene Glycol Polysorbate Polyvinyl Alcohol Silicon Dioxide

Label Claims — Verification

Nutrient
All Other
Structure/Function
All Other (97% of products) Structure/Function (86% of products) Nutrient (36% of products)

Target Groups

Adult (18 - 50 Years) Gluten Free

Product Information

📋 Directions for Use

Directions: As a vitamin supplement, adults take one (1) tablet daily with any meal or as directed by a healthcare provider. Do not exceed recommended dosage. Individual results may vary.

⚠️ Warnings & Precautions

Do not exceed recommended dosage.

Warning: Consult a healthcare provider prior to use if pregnant, nursing, on medications, have a medical condition or are planning a medical procedure.

Stop use and contact a physician if adverse reactions occur. Niacin may cause temporary skin flushing, itching, and feelings of warmth. Do not use if product appears to be tampered with or seal is broken.

Keep out of reach of children.

🧪 Formulation Notes

Prolonged release

Gluten free Non-GMO

Guaranteed Quality Laboratory Tested

Niacin (vitamin B-3) supports energy metabolism, heart health and the nervous system.

Prolonged release vitamins are designed to reduce flushing.

No added sugar, salt, yeast, preservatives, artificial flavors or colors.

Additional Information

Store at room temperature.

Compare VS. Slo-Niacin This product is not manufactured or distributed by Mainpointe Pharmaceuticals, LLC, owner of the registered trademark Slo-Niacin.

Trusted Quality for over 30 years

Product Details

UPC / SKU 7 40985 27474 3
DSLD Entry Date 2025-02-23
Product Type Vitamin
Form Tablet or Pill
Brand 21st Century
DSLD ID 326335
Data Updated 2026-04-11

Research Evidence

241 Research Sources
55 Avg Quality Score
113 Meta Analysis
75 Systematic Review
32 Rct
11 Clinical Trial
3 Other
3 Regulatory Source
1 Cochrane Review
1 Narrative Review
1 Openfda Safety
A Niacin for primary and secondary prevention of cardiovascular events
Meta Analysis The Cochrane database of systematic reviews 2017
A Use of high potency statins and rates of admission for acute kidney injury: multicenter, retrospective observational analysis of administrative databases
Meta Analysis BMJ (Clinical research ed.) 2013
A Effect on cardiovascular risk of high density lipoprotein targeted drug treatments niacin, fibrates, and CETP inhibitors: meta-analysis of randomised controlled trials including 117,411 patients
Meta Analysis BMJ (Clinical research ed.) 2014
A A terminal metabolite of niacin promotes vascular inflammation and contributes to cardiovascular disease risk
Meta Analysis Nature medicine 2024
A Meta-analysis and imputation refines the association of 15q25 with smoking quantity
Meta Analysis Nature genetics 2010
A Genome-wide meta-analyses identify multiple loci associated with smoking behavior
Meta Analysis Nature genetics 2010
A Antidepressants for smoking cessation
Meta Analysis The Cochrane database of systematic reviews 2014
A Topical azelaic acid, salicylic acid, nicotinamide, sulphur, zinc and fruit acid (alpha-hydroxy acid) for acne
Meta Analysis The Cochrane database of systematic reviews 2020
B Assessment of the Role of Niacin in Managing Cardiovascular Disease Outcomes: A Systematic Review and Meta-analysis
Meta Analysis JAMA network open 2019
B Association Between Lowering LDL-C and Cardiovascular Risk Reduction Among Different Therapeutic Interventions: A Systematic Review and Meta-analysis
Meta Analysis JAMA 2016
View all evidence for Niacin →

Compare Similar Products

View all Niacin products →