B-100 Ultra B-Complex by Nature's Bounty — Ingredients, Evidence & Safety

🟢 87/100

This product is generally safe

Niacin: 100mg is 2.9× the Tolerable Upper Intake Level (35mg)
Contains proprietary blend — exact ingredient amounts not disclosed
75% of ingredients have research evidence

C Label Compliance Grade

Product Label

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Safety Alerts

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

ℹ️ Contains proprietary blend — exact ingredient amounts not disclosed

Label Data

1 Tablet(s) Serving Size

Other Combinations Product Type

75% Evidence Coverage

Supplement Facts — Evidence Check

Thiamine

100 mg (6667% DV)

📊 83.3× RDA — above typical dose 📚 76 studies (Tier A: 0, B: 33)

RDA 1.2mg This product: 100mg

Riboflavin

100 mg (5882% DV)

📊 76.9× RDA — above typical dose 📚 12 studies (Tier A: 0, B: 1)

RDA 1.3mg This product: 100mg

Niacin

100 mg (500% DV)

⚠️ Exceeds Tolerable Upper Intake Level by 2.9× (UL: 35 mg) 📚 193 studies (Tier A: 5, B: 63)

RDA 14mg This product: 100mg UL 35mg

Vitamin B6

100 mg (5000% DV)

📊 76.9× RDA — above typical dose (UL: 100 mg) 📚 113 studies (Tier A: 3, B: 35)

RDA 1.3mg This product: 100mg UL 100mg

Folic Acid

400 mcg (25% DV)

✅ Within RDA (1.0× RDA of 0.4 mg) 📚 225 studies (Tier A: 10, B: 105)

RDA 0.4mg This product: 0.4mg UL 1.0mg

Vitamin B12

100 mcg (1667% DV)

📊 41.7× RDA — above typical dose 📚 138 studies (Tier A: 1, B: 44)

RDA 0.0024mg This product: 0.1mg

Biotin

100 mcg (33% DV)

📊 3.3× RDA — above typical dose 📚 26 studies (Tier A: 0, B: 11)

RDA 0.03mg This product: 0.1mg

Pantothenic Acid

100 mg (1000% DV)

📊 20.0× RDA — above typical dose 📚 1 studies — no high-quality reviews

RDA 5mg This product: 100mg

Inositol

12.5 mg

📊 Market median: 550.0mg (217 products) 📚 29 studies (Tier A: 0, B: 5)

This product: 12.5mg

PABA

12.5 mg

📊 Market median: 500.0mg (9 products)

This product: 12.5mg

Choline Bitartrate

12.5 mg

📊 Market median: 125.0mg (294 products) 📚 36 studies (Tier A: 1, B: 7)

RDA 550mg This product: 12.5mg UL 3500mg

Proprietary Blend

62.5 mg

Other Ingredients

Vegetable Cellulose Silica Calcium Silicate Vegetable Magnesium Stearate

Label Claims — Verification

❓ All Other

❓ Structure/Function

All Other (99% of products) Structure/Function (83% of products) Nutrient (47% of products)

Target Groups

Vegetarian Adult (18 - 50 Years)

Product Information

📋 Directions for Use

DIRECTIONS: For adults, take one (1) tablet daily, preferably with a meal.

⚠️ Warnings & Precautions

Keep out of reach of children.

WARNING: Not intended for use by pregnant or nursing women.

Discontinue use and consult your doctor if any adverse reactions occur.

Do not use if seal under cap is broken or missing.

If you are taking any medications, consult your doctor before use.

🧪 Formulation Notes

No Artificial Color or Flavor, No Preservatives, No Sugar, No Milk, No Lactose, No Gluten, No Wheat, No Yeast, No Fish. Sodium Free. Suitable for vegetarians.

Additional Information

Store in cool, dry place.

COATED FOR EASY SWALLOWING

Prod. No. 770 08D B6177

Promotes Energy Metabolism & Nervous System Health*

The B Complex is made up of several vitamins that work well together to support nervous system health.* B Complex vitamins also promote energy metabolism.* Each nutrient in the B Complex performs a unique role in maintaining proper metabolic functioning and is essential for well-being.*

NATURE'S BOUNTY(R)

Product Details

UPC / SKU 0 74312 00770 5

DSLD Entry Date 2012-01-25

Product Type Other Combinations

Form Tablet or Pill

Brand Nature's Bounty

DSLD ID 4230

Data Updated 2026-04-11

Research Evidence

100 Research Sources

56 Avg Quality Score

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 Cochrane

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 Cochrane

View all evidence for Thiamine →