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.

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).

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.

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.

In which products and brands?

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 163 of 203), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

• Stress B GoneBuried Treasure Liquid Nutrients50 mg
• Stress B Plus C-500Good 'N Natural · off the market50 mg
• Stress B With C-500 Time ReleasePuritan's Pride · off the market100 mg
• Stress B with Iron21st Century10 mg
• Stress B with Zinc21st Century10 mg
• Stress B&CPriority One Nutritional Supplements99 mg
• Stress B&C With IronVitaCeutical Labs75 mg
• Stress B-ComplexThorne Research · off the market50 mg
• Stress B-ComplexNature Made10 mg
• Stress B-ComplexBluebonnet50 mg
• Stress B-ComplexThorne50 mg
• Stress B-Complex CapsTwinlab50 mg
• Stress B-Complex Supplement With Vitamin C And IronNature Made10 mg
• Stress B-Complex Supplement With Vitamin C And ZincNature Made10 mg
• Stress B-Complex with C & ZincNature's Bounty20 mg
• Stress B-Complex with Vitamin C365 Everyday Value30 mg
• Stress B-Complex with Zinc and Vitamin CGSL Technology5 mg
• Stress BalanceThorne · off the market24 mg
• Stress DefenseMDR Medical Doctors Research3.8 mg
• Stress EaseAN American Nutriceuticals25 mg
• Stress EndEnzymatic Therapy · off the market12 mg
• Stress EndNature's Way12 mg
• Stress EssentialIntegrative Therapeutics12 mg
• Stress FormulaWindmill10 mg
• Stress FormulaPuritan's Pride Premium · off the market10 mg
• Stress FormulaThe Vitamin Shoppe50 mg
• Stress FormulaMajor10 mg
• Stress FormulaPuritan's Pride10 mg
• Stress Formula With IronWindmill10 mg
• Stress Formula with IronMajor10 mg
• Stress Formula with IronBasic Vitamins10 mg
• Stress Formula With ZincWindmill10 mg
• Stress Formula with ZincMajor15 mg
• Stress Formula with ZincBasic Vitamins10 mg
• Stress GuardOregon's Wild Harvest0.55 mg
• Stress LessRise-N-Shine · off the market50 mg
• Stress Management SystemAltrum12 mg
• Stress PackNeoLife50 mg
• Stress PlusDC15.4 mg
• Stress Plus With Valerian RootNOW30 mg
• Stress Redux PlusVinco's · off the market10 mg
• Stress Redux PlusVinco10 mg
• Stress ReliefETST Earth Science Tech75 mg
• Stress ReliefVimerson Health12 mg
• Stress ReliefGNC Preventive Nutrition6 mg
• Stress Relief PlusEB Earth's Bounty · off the market25 mg
• Stress Relief PlusEarth's Bounty25 mg
• Stress ResetMegaFood3 mg
• Stress ShieldCountry Life5 mg
• Stress Shield 3 Triply ActionCountry Life · off the market5 mg

Where next?

• Check an amount of thiamin
• Labels above the upper limit
• All ingredients