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

• Power Protein 90 Coconut CreamBody Attack Sports Nutrition1.1 mg
• Power Protein Chocolate FlavorUniversal0.32 mg
• Power Protein Vanilla FlavorUniversal0.32 mg
• Power Shake ChocolatePower Blendz · off the market0.29 mg
• Power Shake VanillaPower Blendz · off the market0.29 mg
• Power SoursRainbow Light · off the market0.75 mg
• Power TeenNatures Plus Source of Life · off the market50 mg
• Power TeenNaturesPlus50 mg
• Power Teen for Her Natural Wild Berry FlavorNatures Plus Source of Life · off the market1.9 mg
• Power Teen for Her Natural Wild Berry FlavorNaturesPlus Source of Life · off the market1.9 mg
• Power Teen for Her Wild BerryNaturesPlus Source of Life1.9 mg
• Power Teen for Him Natural Wild Berry FlavorNatures Plus Source of Life · off the market1.9 mg
• Power Teen for Him Natural Wild Berry FlavorNaturesPlus Source of Life1.9 mg
• Power Weight Gainer Banana FlavourBody Attack Sports Nutrition1.1 mg
• Power-MultiMixReturn Healthy · off the market1.5 mg
• Power-Zinc PlusPhysician's Strength0.15 mg
• Powerhouse FormulaGreens Today · off the market3 mg
• PowerPak + Immunity Lemon BerryTrace Minerals0.45 mg
• PowerPak Acai BerryTrace Minerals0.45 mg
• PowerPak CitrusTrace Minerals0.45 mg
• PowerPak Concord GrapeTrace Minerals0.45 mg
• PowerPak CranberryTrace Minerals0.45 mg
• PowerPak Guava Passion FruitTrace Minerals0.45 mg
• PowerPak Lemon LimeTrace Minerals0.45 mg
• PowerPak Mixed BerryTrace Minerals0.45 mg
• PowerPak Orange BlastTrace Minerals0.45 mg
• PowerPak Pineapple Coconut FlavorTrace Minerals0.45 mg
• PowerPak Pomegranate BlueberryTrace Minerals0.45 mg
• PowerPak RaspberryTrace Minerals0.45 mg
• PowerPak TangerineTrace Minerals0.45 mg
• PowerPak WatermelonTrace Minerals0.025 mg as transcribed, likely a slip
• Pqq 20ProCaps Laboratories · off the market5 mg
• PQQ 20 mgProCaps Laboratories · off the market5 mg
• PQQ 20 mgProCaps5 mg
• PQQ AdvantageRoex1.5 mg
• PR Natal 430PruGen, Inc. Pharmaceuticals1.8 mg
• Pre & Post Natal DHA + Iron Fruit FlavoredNoor Vitamins0.85 mg
• PRE Fruit PunchNutricost Women15 mg
• PRE GrapeNutricost Women15 mg
• PRE Peach MangoNutricost Women15 mg
• PRE Pre-Workout Complex Blue RaspberryNutricost Performance50 mg
• PRE Pre-Workout Complex Fruit PunchNutricost Performance50 mg
• PRE Pre-Workout Complex GrapeNutricost Performance50 mg
• PRE Pre-Workout Complex Peach MangoNutricost Performance50 mg
• PRE Pre-Workout Complex WatermelonNutricost Performance50 mg
• PRE StrawberryNutricost Women15 mg
• PRE V.2 Raw UnflavoredNutraBio5 mg
• PRE WatermelonNutricost Women15 mg
• Pre WatermelonNutricost Performance50 mg
• Pre WorkoutDyna Storm Nutrition · off the market2 mg

Where next?

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