PlainVitamins

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.

Thiamin: products by amount per serving0.1 mg1 mg10 mg100 mgDaily Value 1.2 mg
Thiamin: products by amount per serving0.03 mg0.3 mg1 mg3 mg10 mg100 mgDaily Value 1.2 mg
Thiamin: products by amount per serving0.03 mg0.3 mg1 mg3 mg10 mg30 mg100 mgDaily Value 1.2 mg
Thiamin: products by amount per serving0.03 mg0.1 mg0.3 mg1 mg3 mg10 mg30 mg100 mg300 mgDaily Value 1.2 mg
Thiamin: products by amount per serving0.03 mg0.1 mg0.3 mg1 mg3 mg10 mg30 mg100 mg300 mgDaily Value 1.2 mg
The amounts printed most often
Amount per servingProductsFor example
1.5 mg1,163 Spiru-Pro Soy Protein Drink With Spirulina Natural Vanilla (Vitamin World); Iron Free Daily Multiple 50+ (Sundown Naturals); Coral Calcium Plus (MicroTech Professional Formulations)
50 mg839 Sport (GNC Mega Men); Maximum Nutrition Vanilla Bean (GNC Mega Men); Maximum Nutrition Vanilla Creme (GNC Women's Ultra Mega)
25 mg648 Theanine Calm Caps (Vitamin World); Anatherm Heat Metabolics Stimulator (NatureSmart); Green Source (Radiance)
3 mg476 FocusFactor (FOCUSfactor); Basic Plus (Life Zone); Theravim-M (Nature's Bounty)
10 mg474 SizeOn Fruit Punch (Gaspari Nutrition); SizeOn Concord Grape (Gaspari Nutrition); Age Defying Skincare Vitamin (Vite MD)
5 mg469 Extra Strength Estroven (Estroven); Hair, Skin & Nails (Rexall); Multiple Vitamin Formula (Harvard Drug Group)
100 mg433 B-1 100 mg (Vitamin World); B100 Complex (Sundown Naturals); Vitamins For The Hair (Vitamin World)
2 mg306 Healthy Energy Lemon Lime (FRS); Healthy Energy Wild Berry (FRS); Super Joint Formula (Vitabase)
1.2 mg250 One Daily Men's Health Formula (Equaline); One Daily Men's Formula (Top Care); Century Ultimate Men's (Top Care)
15 mg248 Vegetarian Multiple with Beta Carotene (Schiff Daily Wellness); Teen Multiple (FemTeen Symmetry); High Potency B-Complex With Folic Acid Plus Vitamin C (Nature's Bounty)

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).

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.

Median thiamin per serving by the year the label entered DSLD (years with 20+ products)
YearProductsMedian per serving
20112465 mg
20127547.5 mg
20138275 mg
20144903 mg
20154573 mg
20164495 mg
20174907.75 mg
20183982.5 mg
20195363 mg
20209005 mg
20218194 mg
20229343 mg
20238194.8 mg
20249185 mg
20257935 mg

Source: DSLD label entry dates and amounts, current labels.

In which products and brands?

Products listing thiamin by DSLD product type

Thiamin by product typeOther Combinations7,648Multi-Vitamin and Mineral (MVM)997Botanical with Nutrients653Vitamin423Amino acid/Protein58Non-Nutrient/Non-Botanical18Single Vitamin and Mineral16Botanical14
Thiamin by product typeOther Combinations7,648Multi-Vitamin and Mineral (MVM)997Botanical with Nutrients653Vitamin423Amino acid/Protein58Non-Nutrient/Non-Botanical18Single Vitamin and Mineral16Botanical14
Thiamin by product typeOther Combinations7,648Multi-Vitamin and Mineral (MVM)997Botanical with Nutrients653Vitamin423Amino acid/Protein58Non-Nutrient/Non-Botanical18Single Vitamin and Mineral16Botanical14
Thiamin by product typeOther Combinations7,648Multi-Vitamin and Mineral (MVM)997Botanical with Nutrients653Vitamin423Amino acid/Protein58Non-Nutrient/Non-Botanical18Single Vitamin and Mineral16Botanical14
Thiamin by product typeOther Combinations7,648Multi-Vitamin and Mineral (MVM)997Botanical with Nutrients653Vitamin423Amino acid/Protein58Non-Nutrient/Non-Botanical18Single Vitamin and Mineral16Botanical14

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

Where next?