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 183 of 203), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- UltraDetox 10-Day Pure PackPure Encapsulations3 mg
- Ultragen Cappuccino1st Endurance8 mg
- Ultragen ChocolateFirst Endurance8 mg
- Ultragen Orange Creamsicle1st Endurance8 mg
- Ultragen Tropical Punch1st Endurance · off the market8 mg
- Ultragen Tropical PunchFirst Endurance8 mg
- Ultragen VanillaFirst Endurance8 mg
- UltraGenesisNutra BioGenesis25 mg
- UltraLean Body Composition Formula VanillaBioGenesis Nutraceuticals · off the market2 mg
- UltraLean Body Composition Formula Vegan VanillaBioGenesis Nutraceuticals · off the market2 mg
- UltraLean ChocolateNutra BioGenesis1.8 mg
- UltraLean Strawberry Banana FlavorNutra BioGenesis0.64 mg
- UltraLean Vanilla FlavorNutra BioGenesis2 mg
- UltraLean Vegan Chocolate FlavorNutra BioGenesis2 mg
- UltraLean Vegan Vanilla FlavorNutra BioGenesis2 mg
- Ultraman High PotencyNature's Bounty · off the market50 mg
- UltraMeal Advanced Protein PlainMetagenics0.37 mg
- UltraNutrientPure Encapsulations50 mg
- Ultraplex Mediclear-SGSElevation Health · off the market12 mg
- Ultraplex Mediclear-SGS Chocolate FlavoredElevation Health12 mg
- Un-StressMegaFood20 mg
- Uni-ViteUniversal · off the market50 mg
- Uni-ViteUniversal Nutrition50 mg
- Unicomplex-MRugby1.5 mg
- Unique B+A.C. Grace Company15 mg
- Universal Gain Fast 3100 Cookies & CreamUniversal1.5 mg
- Universal Gain Fast 3100 Cookies & Cream FlavorUniversal1.5 mg
- Universal Gain Fast 3100 Strawberry ShakeUniversal1.5 mg
- Universal Power Protein Chocolate FlavorUniversal0.32 mg
- Universal Power Protein Vanilla FlavorUniversal0.32 mg
- Unsweetened Spiru-Tein High Protein Energy Meal Simply Natural BananaNature's Plus · off the market1.5 mg
- Unsweetened Spiru-Tein High Protein Energy Meal Simply Natural Peaches & CreamNature's Plus · off the market1.5 mg
- Unsweetened Spiru-Tein High Protein High Energy Meal Simply Natural ChocolateNature's Plus · off the market1.5 mg
- Unsweetened Spiru-Tein High Protein High Energy Meal Simply Natural Original VanillaNature's Plus · off the market1.5 mg
- Unsweetened Spiru-Tein High Protein High Energy Meal Simply Natural StrawberryNature's Plus · off the market1.5 mg
- Up Your Mass CinnaBunMHP Maximum Human Performancein a blend
- Up Your Mass Cookies 'N CreamMHP Maximum Human Performancein a blend
- Up Your Mass Fudge BrownieMHP Maximum Human Performancein a blend
- Up Your Mass Peanut Butter CookieMHP Maximum Human Performancein a blend
- Up Your Mass StrawberryMHP Maximum Human Performance0.9 mg
- Up Your Mass VanillaMHP Maximum Human Performancein a blend
- UpLift ProVera's Formulations7.5 mg
- Urgent Cell RepairPhytAge Labs2.25 mg
- Urgent EnergyProCaps Labs · off the market10 mg
- Urgent EnergyProCaps Laboratories5 mg
- Uric Acid CleanseBest Naturals3 mg
- Uric Acid SupportAlerna Kidney Health0.375 mg
- Uric Acid Support Plus+Alerna Kidney Health · off the market0.375 mg
- UrthGreensVivid Health Nutrition25 mg
- UsanimalsUSANA1.25 mg