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Cheapest Thiamin (Thiamin Mononitrate) on iHerb

Ranked by real cost per 100 mg of Thiamin (Thiamin Mononitrate) — cheapest value first.

Prices updated Jul 25, 2026 · 25 products · Prices in USD

The priciest option here costs about 21.9× more per 100 mg of Thiamin (Thiamin Mononitrate) than the best-value pick Nutricost. For the same daily dose, choosing by cost per unit instead of sticker price can meaningfully cut your yearly spend.
#ProductDoseServingsPrice (USD)Cost per 100 mg
1
Nutricost, Vitamin B1, 500 mg, 120 Capsules
Nutricost, Vitamin B1, 500 mg, 120 Capsules
Nutricost
500 mg12014.990.025View on iHerb →
2
DaVinci Laboratories, Stress B Capsules , 90 Capsules
DaVinci Laboratories, Stress B Capsules , 90 Capsules
DaVinci Laboratories
55 mg902.000.040View on iHerb →
3
Nutricost, Vitamin B1, 500 mg , 30 Capsules
Nutricost, Vitamin B1, 500 mg , 30 Capsules
Nutricost
500 mg307.990.053View on iHerb →
4
Nature's Truth, Vitamin B-1, 100 mg, 100 Tablets
Nature's Truth, Vitamin B-1, 100 mg, 100 Tablets
Nature's Truth
100 mg1006.590.066View on iHerb →
5
Nutricost, Vitamin B1, 100 mg, 120 Capsules
Nutricost, Vitamin B1, 100 mg, 120 Capsules
Nutricost
100 mg12010.000.083View on iHerb →
6
Superior Source, B-1, 100 Instant Dissolve Tablets
Superior Source, B-1, 100 Instant Dissolve Tablets
Superior Source
100 mg1008.490.085View on iHerb →
7
Oregon's Wild Harvest, Stress Guard, 90 Vegan Capsules
Oregon's Wild Harvest, Stress Guard, 90 Vegan Capsules
Oregon's Wild Harvest
550 mcg3027.960.170View on iHerb →
8
Nature's Truth, Balanced B-100, High Potency, 60 Capsules
Nature's Truth, Balanced B-100, High Potency, 60 Capsules
Nature's Truth
100 mg6011.540.192View on iHerb →
9
Nutricost, Vitamin B Complex, 462 mg, 240 Capsules
Nutricost, Vitamin B Complex, 462 mg, 240 Capsules
Nutricost
60 mg24028.750.200View on iHerb →
10
Nature's Craft, Super B Complex, High Strength, 100 Tablets
Nature's Craft, Super B Complex, High Strength, 100 Tablets
Nature's Craft
100 mg10019.990.200View on iHerb →
11
California Gold Nutrition, High Potency Vitamin B Complex with Methyl Folate & Methyl B12, 90 Veggie Capsules
California Gold Nutrition, High Potency Vitamin B Complex with Methyl Folate & Methyl B12, 90 Veggie Capsules
California Gold Nutrition
110 mg9020.230.204View on iHerb →
12
Nutricost, Vitamin B Complex, 462 mg, 120 Capsules
Nutricost, Vitamin B Complex, 462 mg, 120 Capsules
Nutricost
60 mg12014.950.208View on iHerb →
13
BPI Sports, RoxyLean™, 60 Capsules
BPI Sports, RoxyLean™, 60 Capsules
BPI Sports
185 mg6023.990.216View on iHerb →
14
NaturesPlus, Source of Life®, Green and Red Mini-Tabs, 180 Tablets
NaturesPlus, Source of Life®, Green and Red Mini-Tabs, 180 Tablets
NaturesPlus
25 mg302.000.267View on iHerb →
15
Bluebonnet Nutrition, B-Complex 100, 50 Vegetable Capsules
Bluebonnet Nutrition, B-Complex 100, 50 Vegetable Capsules
Bluebonnet Nutrition
100 mg5015.600.312View on iHerb →
16
21st Century, Full Fuel 365™, Women's Multivitamin, Max Performance, 120 Tablets
21st Century, Full Fuel 365™, Women's Multivitamin, Max Performance, 120 Tablets
21st Century
80 mg6014.990.312View on iHerb →
17
Bariatric Fusion, Vitamin B-50 Complex, 90 Capsules
Bariatric Fusion, Vitamin B-50 Complex, 90 Capsules
Bariatric Fusion
50 mg9015.990.355View on iHerb →
18
21st Century, Mega Multi for Women, 90 Tablets
21st Century, Mega Multi for Women, 90 Tablets
21st Century
80 mg4513.990.389View on iHerb →
19
Vital Nutrients, B-Complex, 60 Vegan Capsules
Vital Nutrients, B-Complex, 60 Vegan Capsules
Vital Nutrients
100 mg6024.990.417View on iHerb →
20
Carlson, B-100 Gels, 200 Soft Gels
Carlson, B-100 Gels, 200 Soft Gels
Carlson
100 mg10043.520.435View on iHerb →
21
Ronnie Coleman, Vital Edition, Vita XS™, 120 Tablets
Ronnie Coleman, Vital Edition, Vita XS™, 120 Tablets
Ronnie Coleman
100 mg6026.990.450View on iHerb →
22
Swolverine, B-Complex, 30 Tablets
Swolverine, B-Complex, 30 Tablets
Swolverine
100 mg3013.590.453View on iHerb →
23
Carlson, B-100 Gels, 100 Soft Gels
Carlson, B-100 Gels, 100 Soft Gels
Carlson
100 mg5023.380.468View on iHerb →
24
Nutricost, Vitamin B Complex, 30 Capsules
Nutricost, Vitamin B Complex, 30 Capsules
Nutricost
60 mg308.990.499View on iHerb →
25
Twinlab, Stress B-Complex Caps, 250 Capsules
Twinlab, Stress B-Complex Caps, 250 Capsules
Twinlab
50 mg12534.150.546View on iHerb →

How we rank Thiamin (Thiamin Mononitrate)

Two supplements can list the same dose per serving yet cost very differently once you account for how many servings are in the bottle. We calculate the total nutrient in each container (dose per serving × servings per container), divide the current price by that total, and rank by the resulting cost per unit. Lower is better. Because prices are refreshed automatically, this ranking reflects today's iHerb pricing rather than a snapshot from months ago.

Cost per unit is a starting point, not the whole story — the ideal form, third-party testing, and other ingredients matter too. Always check the label and consult a healthcare professional before starting a supplement.

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Prices update automatically and may differ from iHerb at checkout. Rankings are based on cost per unit of the listed nutrient and are for informational purposes only — not medical advice. Links to iHerb are affiliate links.