Best Vitamin B1 (thiamin) products by transparent scoring (2026)
Single-ingredient products scored by public rules: dose fit, label transparency, data verification, company transparency, third-party testing. Not a measure of efficacy or safety. No paid placement.
Products ranked: 59 · Reference range: ≥ 1.2 mg (source) · Updated 2026-11-01
Reference range: from 100% of the US Daily Value upward. No authority we cite sets an upper limit for this ingredient, so higher doses are not marked down. That does not mean higher doses are proven safe.
Single-ingredient products only.
Left out of this list: daily dose above 120 mg (100× DV), treated as a likely label error (30); combination products (a single-ingredient list exists) (8)
Dose fit 40 · Label transparency 20 · Data verification 15 · Company transparency 15 · Third-party test 10 (No data (not scored); the other four parts are rescaled from 90 to 100) — Methodology · Vitamin B1 (thiamin) →
| Rank | Product | Per day | Score | Breakdown | ||||||||||||||||
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| 1 | Vitamin B1 100 mg Swanson · US NIH DSLD |
100 mg | 100.0 | Breakdown
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| 2 tie |
B1 100 mg CVS Health · US NIH DSLD |
100 mg | 97.8 | Breakdown
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| 2 tie |
Vitamin B-1 100 mg Nature's Bounty · US NIH DSLD |
100 mg | 97.8 | Breakdown
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| 2 tie |
Vitamin B1 100 mg The Vitamin Shoppe · US NIH DSLD |
100 mg | 97.8 | Breakdown
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| 5 tie |
Vitamin B-1 100 mg Thiamin HCl Nature's Way · US NIH DSLD |
100 mg | 94.4 | Breakdown
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| 5 tie |
Vitamin B1 100 mg Douglas Laboratories · US NIH DSLD |
100 mg | 94.4 | Breakdown
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| 7 tie |
MapleLife¿ Nutrition & Formula and/or NutriCentury¿ Vitamin B1 (Thiamine) Nutralab Canada Corp. · Health Canada LNHPD |
50 mg | 93.3 | Breakdown
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| 7 tie |
MapleLife¿ Nutrition & Formula and/or NutriLab¿ and/or NutriCentury¿ Vitamin B1 (Thiamine) Nutralab Canada Corp. · Health Canada LNHPD |
100 mg | 93.3 | Breakdown
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| 9 tie |
B-1 100 mg Thiamin Carlson · US NIH DSLD |
100 mg | 92.2 | Breakdown
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| 9 tie |
High Potency B1 100 mg Sundown Naturals · US NIH DSLD |
100 mg | 92.2 | Breakdown
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| 9 tie |
Vitamin B1 (Thiamin) 100 mg Solgar · US NIH DSLD |
100 mg | 92.2 | Breakdown
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| 9 tie |
Vitamin B1 100 mg Bluebonnet · US NIH DSLD |
100 mg | 92.2 | Breakdown
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| 9 tie |
Vitamin B1 100 mg Country Life · US NIH DSLD |
100 mg | 92.2 | Breakdown
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| 14 tie |
B1 100 mg Natural Grocers by Vitamin Cottage · US NIH DSLD |
100 mg | 83.3 | Breakdown
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| 14 tie |
B1 25 mg Cherry Burst EZ Melts · US NIH DSLD |
25 mg | 83.3 | Breakdown
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| 14 tie |
Thiamin 100 mg Celebrate · US NIH DSLD |
100 mg | 83.3 | Breakdown
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| 14 tie |
Thiamin 50 mg Seeking Health · US NIH DSLD |
50 mg | 83.3 | Breakdown
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| 14 tie |
Thiamin Vitamin B1 100 Milligrams NutraBio · US NIH DSLD |
100 mg | 83.3 | Breakdown
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| 14 tie |
Thiamine HCl BulkSupplements.com · US NIH DSLD |
100 mg | 83.3 | Breakdown
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| 14 tie |
Thiamine HCl (Vitamin B1) BulkSupplements.com · US NIH DSLD |
100 mg | 83.3 | Breakdown
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| 14 tie |
Vitamin B-1 Thiamin HCl Voitenko Wellness · US NIH DSLD |
100 mg | 83.3 | Breakdown
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| 14 tie |
Vitamin B1 Herb-Science · US NIH DSLD |
6 mg | 83.3 | Breakdown
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| 14 tie |
Vitamin B1 (Thiamine Mononitrate) BulkSupplements.com · US NIH DSLD |
92 mg | 83.3 | Breakdown
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| 14 tie |
Vitamin B1 100 mg Standard Vitamins · US NIH DSLD |
100 mg | 83.3 | Breakdown
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| 14 tie |
Vitamin B1 100 mg Nutricost · US NIH DSLD |
100 mg | 83.3 | Breakdown
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| 14 tie |
Vitamin B1 100 mg AvPak · US NIH DSLD |
100 mg | 83.3 | Breakdown
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| 14 tie |
Vitamin B1 100 mg Vitamatic · US NIH DSLD |
100 mg | 83.3 | Breakdown
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| 14 tie |
Vitamin B1 Thiamine Mononitrate Capsules 100 mg BulkSupplements.com · US NIH DSLD |
100 mg | 83.3 | Breakdown
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| 29 tie |
B-1 100 mg (Thiamin Hydrochloride) Windmill Natural Vitamins · US NIH DSLD |
100 mg | 81.1 | Breakdown
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| 29 tie |
B1 100 mg Thompson · US NIH DSLD |
100 mg | 81.1 | Breakdown
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| 29 tie |
Vitamin B-1 (Thiamin) 100 mg Geri-Care · US NIH DSLD |
100 mg | 81.1 | Breakdown
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| 29 tie |
Vitamin B-1 100 mg Capsule VitalBulk · US NIH DSLD |
100 mg | 81.1 | Breakdown
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| 29 tie |
Vitamin B-1 100 mg Capsule Vitalbulk · US NIH DSLD |
100 mg | 81.1 | Breakdown
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| 29 tie |
Vitamin B-1 50 mg Vitalbulk · US NIH DSLD |
50 mg | 81.1 | Breakdown
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| 29 tie |
Vitamin B1 Whole Foods · US NIH DSLD |
100 mg | 81.1 | Breakdown
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| 29 tie |
Vitamin B1 100 mg Exchange Select X · US NIH DSLD |
100 mg | 81.1 | Breakdown
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| 29 tie |
Vitamin B1 100 mg Foods Plus · US NIH DSLD |
100 mg | 81.1 | Breakdown
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| 38 tie |
AOR Benfotiamine Advanced Orthomolecular Research Inc. · Health Canada LNHPD |
80 mg | 76.7 | Breakdown
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| 38 tie |
B-One CAPSULES Pharmaline Inc. · Health Canada LNHPD |
100 mg | 76.7 | Breakdown
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| 38 tie |
B-One Tablets Pharmaline Inc. · Health Canada LNHPD |
100 mg | 76.7 | Breakdown
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| 38 tie |
Ba 100 mg 2158894 Ontario Inc. · Health Canada LNHPD |
100 mg | 76.7 | Breakdown
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| 38 tie |
FATIGON TABLET THE ZYFAS MEDICAL CO., · Malaysia NPRA |
100 mg | 76.7 | Breakdown
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| 38 tie |
Insect Defend Patch Safety in Motion · Health Canada LNHPD |
75 mg | 76.7 | Breakdown
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| 38 tie |
Organika Health Products Inc. Vitamin B1 Capsules Organika Health Products Inc. · Health Canada LNHPD |
100 mg | 76.7 | Breakdown
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| 38 tie |
Organixs Benfotiamine 100mg Capsule Organixs · Malaysia NPRA |
100 mg | 76.7 | Breakdown
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| 38 tie |
Trophic - Vitamin B1 Trophic Canada · Health Canada LNHPD |
100 mg | 76.7 | Breakdown
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| 38 tie |
VITAMIN B1 PendoPharm, Division of/de Pharmascience Inc. · Health Canada LNHPD |
100 mg | 76.7 | Breakdown
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| 38 tie |
VITAMIN B1 (Thiamine Hydrochloride Tablets USP) 100 mg Pharmascience Inc. / Pendopharms, Division of Pharmascience Inc. · Health Canada LNHPD |
100 mg | 76.7 | Breakdown
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| 38 tie |
VITAMIN B1 (Thiamine Hydrochloride Tablets USP) 50 mg Pharmascience Inc. / Pendopharms, Division of Pharmascience Inc. · Health Canada LNHPD |
50 mg | 76.7 | Breakdown
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| 38 tie |
VITAMIN B1 100 Vitamin B1 Tablets 100 mg Jaapharm Canada Inc. · Health Canada LNHPD |
100 mg | 76.7 | Breakdown
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59 products were scored; the top 50 are listed here. See the rest in the product list.
For information only; not medical advice. Talk to a doctor or pharmacist before starting or stopping any supplement.