Vitamin B1 100 mg by Nature Made — Ingredients, Evidence & Safety

🟢 100/100

This product looks safe

No ingredients exceed tolerable upper intake levels
50% of ingredients have research evidence

A Label Compliance Grade

Product Label

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Label Data

1 Tablet(s) Serving Size

Single Vitamin and Mineral Product Type

50% 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

Calcium

34 mg (3% DV)

Other Ingredients

Cellulose Gel Maltodextrin Croscarmellose Sodium Magnesium Stearate

Label Claims — Verification

❓ Nutrient

❓ All Other

❓ Structure/Function

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

Target Groups

Adult (18 - 50 Years) Gluten Free

Product Information

📋 Directions for Use

Suggested use: Take one tablet daily with a meal. For easier swallowing, take with water before and during ingestion.

⚠️ Warnings & Precautions

Store in a cool, dry place, out of reach of children.

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

🧪 Formulation Notes

Vital for converting food into cellular energy Vitamin B1, or thiamin, is important for cellular energy product.

Vital for converting food into cellular energy - Vitamin B1 (Thiamin) also helps support normal nervous system function

No color added No artificial flavors No preservatives No yeast or starch Gluten free

Vitamin B1, also known as thiamin, is part of the family of B vitamins. It helps support cellular energy production and normal nervous system function. Helps support normal nervous system function Nature Made Vitamin B1 100 mg is guaranteed to meet our high quality standards - it is made from carefully selected ingredients under strict manufacturing process.

No artificial flavors No color added No preservatives No yeast or starch Gluten free

Additional Information

USP Verified Dietary Supplement

#1 Pharmacist recommended

Helps convert food into cellular energy

USP has tested and verified ingredients, potency and manufacturing process. USP sets official standards for dietary supplements. www.uspverified.org Based on Pharmacy Times survey of pharmacists recommending Letter Vitamin Supplements.

Keep bottle tightly closed. Store in a cool, dry place, out of reach of children.

#1 Pharmacist Recommended Letter Vitamin Brand United States Pharmacopeia (USP) verified

Based on US News & World Report - Pharmacy Times Survey of pharmacist recommending in this category.

Product Details

DSLD Entry Date 2019-12-22

Product Type Single Vitamin and Mineral

Form Tablet or Pill

Brand Nature Made

DSLD ID 209169

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 →