vitamin
Thiamin supplements
Half of the 9,830 thiamin supplements in the NIH label database that print an amount list 5 mg or less per serving; the middle half list 1.5 mg to 25 mg (DSLD version 9.4.0, January 2026). The 103 products whose only supplement ingredient is thiamin list a median of 100 mg.
- Products listing it
- 10,1239,830 print an amount; 277 list it inside a blend without an amount
- Median per serving
- 5 mgmiddle half 1.5 mg to 25 mg
- FDA Daily Value
- 1.2 mgthe median is 417% of it
How much thiamin do supplements contain?
The median product lists 5 mg per serving. One in ten lists 0.6 mg or less, one in ten 50 mg or more. The amount printed most often is 1.5 mg (1,163 products).
Products by amount of thiamin per serving
9,830 products, log scale; extreme 0.2% at each end left out of the drawing.
Source: Supplement Facts rows of every product's current label, NIH ODS Dietary Supplement Label Database version 9.4.0; amounts in one measure (weight).
How do the amounts compare with the Daily Value and the upper limit?
The FDA Daily Value for thiamin is 1.2 mg (adults and children 4 and older). The median product gives 417% of it per serving; the 90th percentile 4167%.
The upper limit is for total intake from food, water and supplements unless stated, and does not apply under medical supervision. A label amount is what the maker printed. This is data, not advice: the NIH ODS fact sheets explain what each nutrient does.
Sources: 21 CFR 101.9(c)(8)(iv) (Daily Values); Institute of Medicine, DRI summary tables (2011) (upper limits); on reading them, the FDA's Daily Value page.
Which products list the most thiamin?
On-market products, per serving, with a plausible amount: the rule leaves out likely entry slips, such as an amount far beyond every other label with no %DV or strength on the label to back it (each product page still shows its own amount, marked).
- Super Potency Vitamin B 1 (Thiamin) 500 mgSolgar500 mg
- Vitamin B1 High Potency 500 mgBIOVEA500 mg
- Vitamin B1 500 mgNutraBio500 mg
- Vitamin B1 500 mgDr. Clark Store500 mg
- Vitamin B1 500 mgDr. Clark Research Association Dr. Clark Zentrum500 mg
- Vitamin B-1 500 mgVitalBulk500 mg
- Vitamin B-1 500 mgBest Naturals500 mg
- Vitamin B1 500 mgVitamatic500 mg
Have the amounts changed over the years?
Products whose current label entered DSLD in 2011 list a median of 5 mg; those entered in 2025, 5 mg.
| Year | Products | Median per serving |
|---|---|---|
| 2011 | 246 | 5 mg |
| 2012 | 754 | 7.5 mg |
| 2013 | 827 | 5 mg |
| 2014 | 490 | 3 mg |
| 2015 | 457 | 3 mg |
| 2016 | 449 | 5 mg |
| 2017 | 490 | 7.75 mg |
| 2018 | 398 | 2.5 mg |
| 2019 | 536 | 3 mg |
| 2020 | 900 | 5 mg |
| 2021 | 819 | 4 mg |
| 2022 | 934 | 3 mg |
| 2023 | 819 | 4.8 mg |
| 2024 | 918 | 5 mg |
| 2025 | 793 | 5 mg |
Source: DSLD label entry dates and amounts, current labels.
In which products and brands?
Products listing thiamin by DSLD product type
Brands listing it most: Douglas Laboratories (245), Nature's Way (221), Nature's Plus (207), Country Life (85), ProCaps Laboratories (79), Bronson (78), Rainbow Light (76), NOW (70), Metagenics (64), New Chapter (62).
Every product listing thiamin
10,123 products, A to Z by name (page 20 of 203), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- B-100Good 'N Natural · off the market100 mg
- B-100NOW100 mg
- B-100AN Amazing Nutrition Amazing Formulas100 mg
- B-100Pure Naturals100 mg
- B-100Butterfly Express100 mg
- B-100 B-ComplexFoster Regal100 mg
- B-100 CapsNOW · off the market100 mg
- B-100 ComplexPhysioLogics · off the market100 mg
- B-100 ComplexNutraBio100 mg
- B-100 ComplexExchange Select · off the market100 mg
- B-100 ComplexNatrol100 mg
- B-100 ComplexVitacost100 mg
- B-100 ComplexBest Naturals100 mg
- B-100 ComplexNature Made100 mg
- B-100 ComplexCVS Health100 mg
- B-100 Complex21st Century100 mg
- B-100 ComplexNature's Way100 mg
- B-100 Complex 1000 mgRemedys Nutrition100 mg
- B-100 Complex Extra StrengthBuilt By Nature100 mg
- B-100 Complex Timed ReleaseExchange Select100 mg
- B-100 Complex with B2 CoenzymeNature's Way · off the market100 mg
- B-100 Complex With Folic AcidRadiance Select100 mg
- B-100 Full Spectrum B-ComplexNutraBio100 mg
- B-100 GelCarlson · off the market100 mg
- B-100 GelsCarlson100 mg
- B-100 Ultra B-ComplexNature's Bounty100 mg
- B-100 Ultra B-ComplexGood 'N Natural · off the market100 mg
- B-12 10,000 mcg Energy Boost Mixed BerryNOW Shots3 mg
- B-12 10,000 mcg Mixed BerryNOW Shots3 mg
- B-12 Energy Gummies Natural Peach Raspberry FlavorNature's Truth0.4 mg
- B-125Source Naturals125 mg
- B-125 ComplexSwanson125 mg
- B-125 Complex High Potency FormulaSwanson125 mg
- B-150Wonder Laboratories150 mg
- B-150 Mega B-ComplexGood 'N Natural · off the market150 mg
- B-50Puritan's Pride · off the market50 mg
- B-50Whole Health50 mg
- B-50NOW50 mg
- B-50Baar Nature's Blessing50 mg
- B-50 B-ComplexGood 'N Natural · off the market50 mg
- B-50 B-ComplexFoster Regal50 mg
- B-50 B-Complex VitaminGood 'N Natural · off the market50 mg
- B-50 Balanced B-ComplexNature's Bounty50 mg
- B-50 Caps B-Complex VitaminsNOW · off the market50 mg
- B-50 ComplexGood Neighbor Pharmacy50 mg
- B-50 ComplexPhysioLogics · off the market50 mg
- B-50 Complex365 Everyday Value50 mg
- B-50 Complex21st Century50 mg
- B-50 ComplexNature's Way50 mg
- B-50 ComplexCelebrate50 mg