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B-100 Complex

product on market Tablet or Pill Natrol Safety: 94/100
94/100

This product looks safe

  • Niacin: 100mg is 2.9× the Tolerable Upper Intake Level (35mg)
  • Folate: 667mg is 667.0× the Tolerable Upper Intake Level (1.0mg)
  • 69% of ingredients have research evidence
D Label Compliance Grade

What the Evidence Says

✨ AI-generated · Qwen 3.6 · methodology

This complex contains B vitamins that support energy metabolism and neurological function. There is strong evidence for the roles of thiamine, riboflavin, and folate in cellular health. The overall evidence coverage for this specific formulation is limited.

AI-generated summary based on research evidence. Not medical advice.

Alerts

Safety Alerts

Niacin: 100mg is 2.9× the Tolerable Upper Intake Level (35mg)

Folate: 667mg is 667.0× the Tolerable Upper Intake Level (1.0mg)

Label

Product Label

Label for B-100 Complex
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Tablet(s)
Serving Size
100
Servings
Other Combinations
Product Type
69%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

100 mg (8330% DV)
83.3× RDA — above typical dose 76 studies (A:0, B:33)
100 mg (7690% DV)
76.9× RDA — above typical dose 13 studies (A:0, B:1)
100 mg (630% DV)
Exceeds UL by 2.9× (UL: 35 mg) 196 studies (A:5, B:63)
100 mg (5880% DV)
76.9× RDA — above typical dose (UL: 100 mg) 114 studies (A:3, B:35)
667 mcg DFE (170% DV)
Exceeds UL by 667.0× (UL: 1.0 mg) 226 studies (A:10, B:105)
100 mcg (4170% DV)
41.7× RDA — above typical dose 139 studies (A:1, B:44)
100 mcg (330% DV)
3.3× RDA — above typical dose 27 studies (A:0, B:11)
100 mg (2000% DV)
20.0× RDA — above typical dose 2 studies — no high-quality reviews
Calcium
17 mg (1% DV)
100 mg (20% DV)
Within RDA (0.2× RDA) 38 studies (A:1, B:7)
UltraGreen Blend
150 mg
100 mg
Market median: 550.0mg (217 products) 29 studies (A:0, B:5)
Market median: 500.0mg (9 products) 7 studies — no high-quality reviews

Other Ingredients

Microcrystalline Cellulose Stearic Acid Silicon Dioxide Cellulose Gum Dicalcium Phosphate Maltodextrin Methylcellulose Magnesium Stearate Hypromellose Caramel color Gum Arabic Glycerin
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Directions: Take 1 tablet, one time daily, with a meal.

Warnings & Precautions

Contains: Wheat

Warning: Consult your healthcare professional prior to use if you have or suspect a medical condition, are taking prescription drugs, or are pregnant or lactating.

Keep out of reach of children.

Formulation Notes

Contains: Wheat

No: Milk, Egg, Fish, Crustacean Shellfish, Tree Nuts, Peanuts, Soybeans, Yeast, Artificial Flavors, Added Sugar or Preservatives

Contains all B Vitamins

Vegetarian

Additional Information

Store in a cool, dry place.

ITEM: 237.911 F: 3000142 L: 2009800-17194

Energy support Promotes energy Supports a healthy nervous system

Vegetarian

Metadata

Product Details

UPC / SKU0 47469 00237 4
DSLD Entry Date2019-05-28
Product TypeOther Combinations
FormTablet or Pill
BrandNatrol
DSLD ID203119
Data Updated2026-04-11
Research

Research Evidence

100
Research Sources
56
Avg Quality
48
Systematic Review
30
Meta Analysis
13
Rct
6
Clinical Trial
1
Cochrane Review
1
Regulatory Source
B Thiamine for prevention and treatment of Wernicke-Korsakoff Syndrome in people who abuse alcohol
Systematic Review The Cochrane database of systematic reviews 2013 PubMed DOI
B Efficacy of B-vitamins and vitamin D therapy in improving depressive and anxiety disorders: a systematic review of randomized controlled trials
Systematic Review Nutritional neuroscience 2023 PubMed DOI
B Effect of thiamine supplementation on glycaemic outcomes in adults with type 2 diabetes: a systematic review and meta-analysis
Meta Analysis BMJ open 2022 PubMed DOI
B Effect of intravenous thiamine administration on critically ill patients: A systematic review and meta-analysis of randomized controlled trials
Meta Analysis Clinical nutrition (Edinburgh, Scotland) 2024 PubMed DOI
B Effect of adjunctive vitamin C, glucocorticoids, and vitamin B1 on longer-term mortality in adults with sepsis or septic shock: a systematic review and a component network meta-analysis
Systematic Review Intensive care medicine 2022 PubMed DOI
B Effect of Combined Diclofenac and B Vitamins (Thiamine, Pyridoxine, and Cyanocobalamin) for Low Back Pain Management: Systematic Review and Meta-analysis
Meta Analysis Pain medicine (Malden, Mass.) 2020 PubMed DOI
B Thiamine, Ascorbic Acid, and Hydrocortisone As a Metabolic Resuscitation Cocktail in Sepsis: A Meta-Analysis of Randomized Controlled Trials With Trial Sequential Analysis
Meta Analysis Critical care medicine 2021 PubMed DOI
B The effects of thiamine supplementation on patients with heart failure: A systematic review and meta-analysis of randomized controlled trials
Meta Analysis Complementary therapies in medicine 2022 PubMed DOI
B Hydrocortisone Combined with Vitamin C and Thiamine in the Treatment of Sepsis/Septic Shock: A Systematic Review with Meta-Analysis and Trial Sequential Analysis
Meta Analysis Clinical and investigative medicine. Medecine clinique et experimentale 2023 PubMed DOI
B Thiamine for Wernicke-Korsakoff Syndrome in people at risk from alcohol abuse
Systematic Review The Cochrane database of systematic reviews 2004 PubMed
View all evidence for Thiamine →
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.