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 74 of 203), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Healthy Energy Pomegranate BlueberryFRS1.5 mg
- Healthy Energy Wild BerryFRS2 mg
- Healthy Feet & NervesTerry Naturally25 mg
- Healthy GlucosePriority One Nutritional Supplements99 mg
- Healthy Hair Skin & Nails Plus Pomegranate 40:40ProCaps Laboratories5 mg
- Healthy Hair with Biotin 10,000 PlusBio Nutrition5 mg
- Healthy Hair, Skin & NailsNature's Blend1.5 mg
- Healthy Hair, Skin & NailsTerra Origin5 mg
- Healthy Hair, Skin & NailsProCaps Laboratories3 mg
- Healthy Hair, Skin & NailsProCaps3 mg
- Healthy JointsSupplement Spot1 mg
- Healthy JointsRise-N-Shine · off the market0.5 mg
- Healthy Metabolism Soft Chew Pink LemonadeGNC Total Lean0.15 mg
- Healthy Mom Prenatal MultiNature's Bounty Optimal Solutions1.8 mg
- Healthy Protein Blackberry AcaiFRS2 mg
- Healthy Protein Orange CreamFRS2 mg
- Healthy Slim TropicalFRS2 mg
- Healthy TestosteroneGNC Men's2 mg
- Healthy Testosterone FormulaGNC Preventive Nutrition · off the market2 mg
- Healthy Transformation Advanced NutritionMetagenics12.5 mg
- Healthy Weight FormulaVitabase10 mg
- Hear Well1-800-WellMed · off the market3 mg
- HeartGNC Mega Men50 mg
- HeartGNC Women's Ultra Mega50 mg
- Heart DUO MicrosolveFitLine0.2 mg
- Heart Health Black CherryEmergen-C0.38 mg
- Heart Health Omega-3 + CoQ10FemMed20 mg
- Heart Health Support PackNature's Bounty1.5 mg
- Heart Healthy MultivitaminDr. Sinatra20 mg
- Heart Healthy Multivitamin CompleteDr. Sinatra20 mg
- Heart Healthy Multivitamin for WomenDr. Sinatra · off the market20 mg
- Heart Healthy Multivitamin MenDr. Sinatra20 mg
- Heart Healthy Multivitamin WomenDr. Sinatra20 mg
- Heart MiracleCentury Systems25 mg
- Heart ScienceSource Naturals50 mg
- Heart SupportNOW50 mg
- Heartbeat EliteCarlson30 mg
- Heavy Metal Cleanse 1 Morning FormulaRenew Life25 mg
- HeightFactorAdvanced Nutrition by Zahler0.05 mg as transcribed, likely a slip
- Hema BlendAkasha Naturals5 mg
- Hema-Plex CapsulesNatures Plus · off the market25 mg
- Hema-Plex CapsulesNaturesPlus25 mg
- Hema-Plex Chewables Delicious Mixed Berry FlavorNatures Plus · off the market2.25 mg
- Hema-Plex Chewables Delicious Mixed Berry FlavorNaturesPlus · off the market2.25 mg
- Hema-Plex Chewables Delicious Mixed Berry FlavoredNaturesPlus2.25 mg
- Hema-Plex Fast-Acting CapsulesNatures Plus · off the market25 mg
- Hema-Plex Fast-Acting SofgelsNature's Plus · off the market25 mg
- Hema-Plex Liquid Delicious Mixed Berry FlavorNatures Plus · off the market0.3 mg
- Hema-Plex Liquid Delicious Mixed Berry FlavorNaturesPlus0.6 mg
- Hema-Plex Mini-TabsNaturesPlus25 mg