Nature Made Vitamin B-1 100 mg Supplement supplement bottle
Nature Made

Vitamin B-1 100 mg Supplement

What We Researched
1 active ingredient analyzed · 5 inactive ingredients decoded · 4 brand certifications checked · 2 retailers compared · Last updated: Mar 2026
100
Product Score Excellent
86
Brand Score Good

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Thiamine 100 mg 6667%
Bioavailability Excellent

Absorption Rating

  • Thiamine Good
Other Ingredients Excellent

Fillers & Additives

  • Dibasic Calcium Phosphate
  • Thiamine Hydrochloride
  • Cellulose Gel
  • Hydroxypropyl Methylcellulose
  • Magnesium Stearate
Efficacy Excellent

Dosage Analysis

  • Thiamine 100 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Thiamine 100 mg 6667%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Dibasic Calcium Phosphate Generally_safe

It is used as a filler and to improve tablet hardness.

Thiamine Hydrochloride Safe

It is included as a source of vitamin B1.

Cellulose Gel Generally_safe

It is used as a thickening agent to improve the texture of supplements.

Hydroxypropyl Methylcellulose Safe

It is used as a coating for tablets and capsules.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

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
Nature Made

Founded 1971 · West Hills, California, USA · 161 products · naturemade.com

Certifications

4 certifications
Consumerlab Verified Source
Labdoor Verified Source
Usp Verified Verified Source
Fda Gmp Inspections Verified Source

Transparency

4 claims
Third Party Testing Claim — Verified Source
Coa Availability — Claimed Source
In House Testing — Verified Source

Violation History

2 incidents
Lawsuit Presence of toxic plastic chemicals in prenatal multivitamins.2025Source
Recall Specific lots of Nature Made Adult Gummies Multi, Multi + Omega-3, Multi for Her plus Omega-3s, and Super B Complex w/C & Folic Acid2016-06-15Source
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Frequently Asked Questions
Is Nature Made Vitamin B-1 100 mg Supplement a good supplement?

Nature Made Vitamin B-1 100 mg Supplement received a product quality score of 100/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 1 active ingredients Of the 5 inactive ingredients, 3 are rated safe and 0 are flagged for review. The manufacturer, Nature Made, holds a brand trust score of 86/100 with 4 verified certifications including Consumerlab, Labdoor, Usp Verified, Fda Gmp Inspections.

What are the ingredients in Nature Made Vitamin B-1 100 mg Supplement?

Nature Made Vitamin B-1 100 mg Supplement contains 1 active ingredients: Thiamine (100 mg). Notable high-dose ingredients include Thiamine at 6667% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Nature Made Vitamin B-1 100 mg Supplement safe to take?

Nature Made Vitamin B-1 100 mg Supplement 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.

Is Nature Made a trustworthy supplement brand?

Nature Made receives a brand trust score of 86/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1971 and headquartered in West Hills, California, USA, the company offers 161 products in their lineup. They hold 4 verified certifications including Consumerlab, Labdoor, Usp Verified, Fda Gmp Inspections. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Nature Made has 2 historical regulatory incidents on record, which are factored into the trust score.

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.