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 132 of 203), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Optimal Balance For MenHardy Nutritionals27 mg
- Optimal Balance For WomenHardy Nutritionals · off the market27 mg
- Optimal Detox ChocolateSeeking Health15 mg
- Optimal Detox VanillaSeeking Health15 mg
- Optimal Energy 2-in-1 Prebiotics + Probiotics 20 BillionRenew Life1.2 mg
- Optimal ManSeeking Health50 mg
- Optimal Multi-CapsVitaScript50 mg
- Optimal MultivitaminSeeking Health50 mg
- Optimal Multivitamin ChewableSeeking Health8 mg
- Optimal Multivitamin Methyl OneSeeking Health25 mg
- Optimal Multivitamin Minus OneSeeking Health25 mg
- Optimal Multivitamin PlusSeeking Health10 mg
- Optimal Multivitamin Powder CherrySeeking Health5 mg
- Optimal Multivitamin w/IronSeeking Health12 mg
- Optimal PrenatalSeeking Health5 mg
- Optimal Prenatal ChewableSeeking Health4 mg
- Optimal Prenatal ChocolateSeeking Health5 mg
- Optimal Prenatal Methyl-FreeSeeking Health5 mg
- Optimal Prenatal VanillaSeeking Health5 mg
- Optimal Sleep IISeeking Health5 mg
- Optimal Solutions Hair, Skin & NailsEsmond Natural5 mg
- Optimal StartSeeking Health50 mg
- Optimal Vitamin BLongevity Medical Clinic50 mg
- OptimenON Optimum Nutrition75 mg
- OptiminAbbott16.05 mg
- Optimmuner PlusHypernaturals11 mg
- Optimum SilverVitamin Research Products10 mg
- Optimum Strength MultiVitaminLife Extension75 mg
- OptiMune Citrus FlavorIVL Institute For Vibrant Living0.75 mg
- Optismal No Tingle Blueberry GummyEkkovision0.003 mg as transcribed, likely a slip
- Optisource Post Bariatric CitrusNestle HealthScience Optisource · off the market3 mg
- Optisource Post Bariatric Surgery Formula CitrusOptisource · off the market0.375 mg
- Optivite P.M.T.Optimox Corporation · off the market25 mg
- Optivite P.M.T.Optimox · off the market25 mg
- Opus Extreme Intra-Workout Juicy WatermelonMagnum Nutraceuticals0.7 mg
- Opus Extreme Intra-Workout Twister PopMagnum Nutraceuticals1.4 mg
- Opus Red Berry CandyMagnum Nutraceuticals0.7 mg
- OralNaturally Clear5 mg
- Oral ChelateMicroTech Professional Formulations4 mg
- Orange Cleansing LiquidPurified Brand2.5 mg
- Orange TriadControlled Labs30 mg
- Orange Triad + Greens Orange FlavorControlled Labs30 mg
- Organic All-In-One Decadent ChocolatePurely Inspired0.3 mg
- Organic All-In-One French VanillaPurely Inspired0.2 mg
- Organic ChlorellaSoTru · off the market0.026 mg
- Organic Chlorella 200 mgGreen Foods · off the market0.038 mg
- Organic Chlorella 500 mgGreen Foods0.038 mg
- Organic Chlorella PowderGreen Foods38 mg as transcribed, likely a slip
- Organic Chlorella TabletsGreen Foods38 mg as transcribed, likely a slip
- Organic Forti-FlaxBarlean's0.25 mg