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

• Pre Zero-Stim Aussie AppleStaunch · off the market75 mg
• Pre Zero-Stim Blue 'Baz' BerryStaunch · off the market75 mg
• Pre Zero-Stim Peach MangoStaunch · off the market75 mg
• Pre Zero-Stim Pina KoalaStaunch · off the market75 mg
• Pre-Alpha Blue RaspberryIMSOALPHA1.5 mg
• Pre-Game Formula Blue RaspberryProven4 Sport P43 mg
• Pre-Game Formula Cherry LimeadeProven4 Sport P43 mg
• Pre-Game Formula Fruit PunchProven4 Sport P43 mg
• Pre-Game Formula WatermelonProven4 Sport P43 mg
• Pre-NatalViva Vitamins30 mg
• Pre-NatalHer Own1.5 mg
• Pre-NatalPriority One Nutritional Supplements30 mg
• Pre-Natal FormulaPhysioLogics · off the market1.7 mg
• Pre-Natal Multi-Vitamin Multi-Mineral SupplementHome Health8 mg
• Pre-Natal Multivitamin With DHAProtocol For Life Balance5 mg
• Pre-Natal PacksBiotics Research Corporation1.5 mg
• Pre-Natural ComplexVitamin World1.7 mg
• Pre-OpSurgery Vitamin · off the market12.5 mg
• Pre-Op Healing Optimization FormulaHealFast7.5 mg
• PRE-SF Blue RaspberryNutricost Performance75 mg
• PRE-SF Peach MangoNutricost Performance75 mg
• PRE-SF Pink LemonadeNutricost Performance75 mg
• Pre-Teen BoysMNP Michael's Naturopathic Programs · off the market20 mg
• Pre-Teen Boys Daily Multi VitaminMichael's Naturopathic Programs20 mg
• Pre-Teen Boys Daily Multi VitaminMNP Michael's Naturopathic Programs20 mg
• Pre-Teen Boys Multivitamin TabletsMH Michael's Health Naturopathic Programs20 mg
• Pre-Teen GirlsMNP Michael's Naturopathic Programs · off the market20 mg
• Pre-Teen Girls Daily Multi VitaminMichael's Naturopathic Programs · off the market20 mg
• Pre-Teen Girls Daily Multi VitaminMNP Michael's Naturopathic Programs · off the market20 mg
• Pre-Teen Girls Multivitamin TabletsMH Michael's Health Naturopathic Programs20 mg
• Pre-Vites Children's Chewable Delicious Natural Orange FlavorPuritan's Pride0.52 mg
• Pre-Workout Complex Blue RaspberryNutricost15 mg
• Pre-Workout Complex Blue RaspberryNutricost Women15 mg
• Pre-Workout Complex Tropical PunchOrigin Performance50 mg
• Pre-Workout For Women StrawberryNutricost15 mg
• Pre-Workout Igniter Blue RaspberryMarked Nutrition · off the market0.45 mg
• Pre-Workout Igniter Fruit PunchMarked Nutrition · off the market0.45 mg
• Pre/Post Natal VitaminsNutri-West7.5 mg
• PreferaOBAlaven Pharmaceutical · off the market1.5 mg
• PreferaOB TabletAlaven Pharmaceutical · off the market1.5 mg
• Preg-Natal + DHAJarrow Formulas · off the market3 mg
• Preg-Natal TabletsJarrow Formulas · off the market3 mg
• Pregna ViteGenestra Brands2.8 mg
• PregnancyFemMed10 mg
• Pregnancy + GingerFemMed10 mg
• Pregnancy Care AdvancedMetagenics12.5 mg
• Pregnancy MultinutrientInessa8 mg
• Pregnancy PlanningBayer One A Day1.4 mg
• Pregnancy PlusHigher Nature50 mg
• Pregnancy Whole Foods Nutrients FormulaCATALO3 mg

Where next?

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