Vitamins
Vitamin B1 (thiamine)
A B vitamin, also called thiamine, from whole grains, pork and beans. Your body needs it to turn carbs into energy and for the nerves and heart.
67 products from US online stores, sorted by what 100 mg of vitamin B1 costs – not by the price per pack.
0.93¢Lowest cost
per 100 mg vitamin B1
- Prices checked Nov 1, 2026, US
- No paid placements
What does 100 mg mean?
- vitamin B1 per serving in most of the products we checked
- 80–500 mgvitamin B1 per serving in most of the products we checked
- 100 mg is a fixed amount to compare by: half of the 67 products we checked have up to 150 mg per serving, the other half more.
- 100 mg is more than the 1.1–1.2 mg recommended a day for adults (NIH (opens in a new tab)).
We compare by 100 mg only so products line up – it’s not a recommendation. Not medical advice.
Where products miss quality points
How the 67 products score
- Very good 90+: 1
- Good 75+: 66
- Fair 60+: 0
- Low under 60: 0
- have no seal from an independent testing program
- 99%have no seal from an independent testing program10 of 30 testing points for GMP, 15 for the 6 whose label says “third-party tested”
The full 30 testing points need an independent test. Every supplement sold in the US is made under the FDA’s GMP rules – the maker checks its own products, which gives 10 points. A seal from a testing program like NSF, USP or Informed Choice means a lab outside the company checks that what’s inside matches the label. Most brands don’t take part. That doesn’t make a product bad – without a seal, a clean product still gets up to 80.
We find seals on the label and in NSF’s public lists. USP and Informed Choice don’t let us search their lists automatically, so a seal that’s only in their lists can be missing. How the score works
Pack size
Compare packs of a similar size.
All sizes in one list can affect the results – big packs usually cost less per 100 mg. Pick a size above to compare packs that are alike.
67 products · cheapest per 100 mg vitamin B1 first
- Rank 1
BulkSupplements
Thiamine HCl (Vitamin B1) Powder
Powder
80Good qualityCountry not stated0.93¢per 100 mg
Lowest
- Pack
- $92.9710,000 servings
- Vitamin B1 per serving
- 100 mg
- Pack lasts
- 10,000 daysif you take 100 mg a day
bulksupplements.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 2
BulkSupplements
Thiamine Mononitrate (Vitamin B1) Powder
Powder
80Good qualityCountry not stated1.4¢per 100 mg
55% more
- Pack
- $52.974,000 servings
- Vitamin B1 per serving
- 92 mg
- Pack lasts
- 3,680 daysif you take 100 mg a day
bulksupplements.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 3
Vitamatic
Vitamin B1 Powder, Unflavored
Powder
80Good qualityCountry not stated1.5¢per 100 mg
61% more
- Pack
- $14.99200 servings
- Vitamin B1 per serving
- 500 mg
- Pack lasts
- 1,000 daysif you take 100 mg a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 4
BulkSupplements
Benfotiamine Powder
Powder
80Good qualityCountry not stated1.6¢per 100 mg
76% more
- Pack
- $81.973,333 servings
- Vitamin B1 per serving
- 150 mg
- Pack lasts
- 4,999 daysif you take 100 mg a day
bulksupplements.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 5
BulkSupplements
Benfotiamine Powder
Powder
80Good qualityCountry not stated2.2¢per 100 mg
141% more
- Pack
- $55.971,667 servings
- Vitamin B1 per serving
- 150 mg
- Pack lasts
- 2,500 daysif you take 100 mg a day
bulksupplements.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 6
Vitamatic
Vitamin B1, 500 mg
Capsules
80Good qualityMade in USA2.3¢per 100 mg
151% more
- Pack
- $13.99120 capsules
- Vitamin B1 per serving
- 500 mgin 1 capsule
- Pack lasts
- 120 daysif you take 1 capsule (500 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 7
Best Naturals
Vitamin B1 as Thiamine Mononitrate 500 mg
Tablets
80Good qualityMade in USA2.5¢per 100 mg
168% more
- Pack
- $14.95120 tablets
- Vitamin B1 per serving
- 500 mgin 1 tablet
- Pack lasts
- 120 daysif you take 1 tablet (500 mg) a day
shopbestnaturals.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 8
Nutricost
Vitamin B1, 500 mg
Capsules
85Good qualityMade in USA2.5¢per 100 mg
169% more
- Pack
- $14.99120 capsules
- Vitamin B1 per serving
- 500 mgin 1 capsule
- Pack lasts
- 120 daysif you take 1 capsule (500 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 9
Vitamatic
Vitamin B1 Thiamine 500mg
Capsules
80Good qualityMade in USA2.5¢per 100 mg
169% more
- Pack
- $14.99120 capsules
- Vitamin B1 per serving
- 500 mgin 1 capsule
- Pack lasts
- 120 daysif you take 1 capsule (500 mg) a day
vitamaticusa.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 10
BulkSupplements
Thiamine HCl (Vitamin B1) Powder
Powder
80Good qualityCountry not stated2.6¢per 100 mg
179% more
- Pack
- $25.971,000 servings
- Vitamin B1 per serving
- 100 mg
- Pack lasts
- 1,000 daysif you take 100 mg a day
bulksupplements.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 11
Nutricost
Vitamin B1 Thiamine Capsules
Capsules
85Good qualityMade in USA2.8¢per 100 mg
204% more
- Pack
- $16.97120 capsules
- Vitamin B1 per serving
- 500 mgin 1 capsule
- Pack lasts
- 120 daysif you take 1 capsule (500 mg) a day
nutricost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 12
Mason Natural
Vitamin B-1, 250 mg
Tablets
80Good qualityMade in USA3.1¢per 100 mg
237% more
- Pack
- $7.83100 tablets
- Vitamin B1 per serving
- 250 mgin 1 tablet
- Pack lasts
- 100 daysif you take 1 tablet (250 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 13
Solgar
Vitamin B1, 500 mg
Tablets
80Good qualityCountry not stated3.2¢per 100 mg
245% more
- Pack
- $16.06100 tablets
- Vitamin B1 per serving
- 500 mgin 1 tablet
- Pack lasts
- 100 daysif you take 1 tablet (500 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 14
Source Naturals
Vitamin B-1, High Potency, 500 mg
Tablets
80Good qualityCountry not stated3.4¢per 100 mg
264% more
- Pack
- $16.94100 tablets
- Vitamin B1 per serving
- 500 mgin 1 tablet
- Pack lasts
- 100 daysif you take 1 tablet (500 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 15
Vitamatic
Vitamin B1 100mg High Potency
Tablets
80Good qualityMade in USA4¢per 100 mg
330% more
- Pack
- $9.99250 tablets
- Vitamin B1 per serving
- 100 mgin 1 tablet
- Pack lasts
- 250 daysif you take 1 tablet (100 mg) a day
vitamaticusa.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 16
Nutricost
Benfotiamine (600 mg)
Capsules
80Good qualityCountry not stated4.3¢per 100 mg
358% more
- Pack
- $22.97180 capsules90 servings
- Vitamin B1 per serving
- 600 mgin 2 capsules
- Pack lasts
- 180 daysif you take 1 capsule (300 mg) a day
nutricost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 17
Nature's Life
Energizing Thiamine (B-1), 500 mg
Tablets
80Good qualityCountry not stated4.4¢per 100 mg
374% more
- Pack
- $11.0150 tablets
- Vitamin B1 per serving
- 500 mgin 1 tablet
- Pack lasts
- 50 daysif you take 1 tablet (500 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 18
Micro Ingredients
Vitamin B1 with Benfotiamine
Softgels
85Good qualityCountry not stated4.5¢per 100 mg
384% more
- Pack
- $26.99240 softgels120 servings
- Vitamin B1 per serving
- 500 mgin 2 softgels
- Pack lasts
- 240 daysif you take 1 softgel (250 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 19
Micro Ingredients
Vitamin B1 500mg with Benfotiamine with MCT Oil
Softgels
80Good qualityCountry not stated4.5¢per 100 mg
384% more
- Pack
- $26.99240 softgels120 servings
- Vitamin B1 per serving
- 500 mgin 2 softgels
- Pack lasts
- 240 daysif you take 1 softgel (250 mg) a day
microingredients.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 20
Vitamatic
Benfotiamine 300mg Supplement
Capsules
80Good qualityCountry not stated4.8¢per 100 mg
417% more
- Pack
- $12.9990 capsules
- Vitamin B1 per serving
- 300 mgin 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule (300 mg) a day
vitamaticusa.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 21
Vitamatic
Vitamin B1, 100 mg
Tablets
80Good qualityMade in USA5.2¢per 100 mg
459% more
- Pack
- $12.99250 tablets
- Vitamin B1 per serving
- 100 mgin 1 tablet
- Pack lasts
- 250 daysif you take 1 tablet (100 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 22
Nutricost
Benfotiamine, 300 mg
Capsules
85Good qualityMade in USA5.9¢per 100 mg
535% more
- Pack
- $15.9590 capsules
- Vitamin B1 per serving
- 300 mgin 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule (300 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 23
Vitamatic
Benfotiamine, 300 mg
Capsules
80Good qualityMade in USA5.9¢per 100 mg
537% more
- Pack
- $15.9990 capsules
- Vitamin B1 per serving
- 300 mgin 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule (300 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 24
Source Naturals
Vitamin B-1Thiamin
Tablets
80Good qualityCountry not stated6.6¢per 100 mg
607% more
- Pack
- $6.57100 tablets
- Vitamin B1 per serving
- 100 mgin 1 tablet
- Pack lasts
- 100 daysif you take 1 tablet (100 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 25
Nutricost
Benfotiamine (300 MG)
Capsules
80Good qualityMade in USA6.7¢per 100 mg
616% more
- Pack
- $17.9790 capsules
- Vitamin B1 per serving
- 300 mgin 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule (300 mg) a day
nutricost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 26
Nature's Truth
Vitamin B-1, 100 mg
Tablets
80Good qualityCountry not stated6.9¢per 100 mg
644% more
- Pack
- $6.92100 tablets
- Vitamin B1 per serving
- 100 mgin 1 tablet
- Pack lasts
- 100 daysif you take 1 tablet (100 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 27
NaturesPlus
Vitamin B1, 300 mg
Tablets
80Good qualityCountry not stated7.1¢per 100 mg
660% more
- Pack
- $19.0890 tablets
- Vitamin B1 per serving
- 300 mgin 1 tablet
- Pack lasts
- 90 daysif you take 1 tablet (300 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 28
Sundance Vitamins
Vitamin B-1 100mg
Tablets
80Good qualityCountry not stated7.2¢per 100 mg
669% more
- Pack
- $7.15100 tablets
- Vitamin B1 per serving
- 100 mgin 1 tablet
- Pack lasts
- 100 daysif you take 1 tablet (100 mg) a day
sundancevitamins.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 29
Nature's Truth
Benfotiamine, 300 mg
Capsules
80Good qualityCountry not stated7.3¢per 100 mg
684% more
- Pack
- $13.1260 capsules
- Vitamin B1 per serving
- 300 mgin 1 capsule
- Pack lasts
- 60 daysif you take 1 capsule (300 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 30
Nature Made
Vitamin B1
Tablets
100Very good qualityCountry not stated7.4¢per 100 mg
695% more
- Pack
- $7.39100 tablets
- Vitamin B1 per serving
- 100 mgin 1 tablet
- Pack lasts
- 100 daysif you take 1 tablet (100 mg) a day
naturemade.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 31
Swanson Vitamins
Vitamin B1 Thiamin, 100 mg
Capsules
80Good qualityCountry not stated8¢per 100 mg
756% more
- Pack
- $19.89250 capsules
- Vitamin B1 per serving
- 100 mgin 1 capsule
- Pack lasts
- 250 daysif you take 1 capsule (100 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 32
Swanson Vitamins
Vitamin B1 Thiamin
Capsules
80Good qualityCountry not stated8¢per 100 mg
756% more
- Pack
- $19.89250 capsules
- Vitamin B1 per serving
- 100 mgin 1 capsule
- Pack lasts
- 250 daysif you take 1 capsule (100 mg) a day
swansonvitamins.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 33
Doctor's Best
Benfotiamine with BenfoPure 150 mg
Capsules
80Good qualityCountry not stated8¢per 100 mg
756% more
- Pack
- $42.99360 capsules
- Vitamin B1 per serving
- 150 mgin 1 capsule
- Pack lasts
- 360 daysif you take 1 capsule (150 mg) a day
drbvitamins.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 34
Nature's Truth
Vitamin B-1 100 mg
Tablets
80Good qualityCountry not stated8¢per 100 mg
759% more
- Pack
- $7.99100 tablets
- Vitamin B1 per serving
- 100 mgin 1 tablet
- Pack lasts
- 100 daysif you take 1 tablet (100 mg) a day
naturestruth.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 35
Doctor's Best
Benfotiamine with BenfoPure, 150 mg
Capsules
80Good qualityCountry not stated8.2¢per 100 mg
782% more
- Pack
- $44.28360 capsules
- Vitamin B1 per serving
- 150 mgin 1 capsule
- Pack lasts
- 360 daysif you take 1 capsule (150 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 36
NaturesPlus
Vitamin B1 300mg Sustained Release
Tablets
80Good qualityCountry not stated8.3¢per 100 mg
794% more
- Pack
- $22.4590 tablets
- Vitamin B1 per serving
- 300 mgin 1 tablet
- Pack lasts
- 90 daysif you take 1 tablet (300 mg) a day
naturesplus.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 37
Best Naturals
Vitamin B1 as Thiamine Mononitrate 100 mg
Tablets
80Good qualityMade in USA8.3¢per 100 mg
795% more
- Pack
- $9.99120 tablets
- Vitamin B1 per serving
- 100 mgin 1 tablet
- Pack lasts
- 120 daysif you take 1 tablet (100 mg) a day
shopbestnaturals.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 38
Nutricost
Vitamin B1, 100 mg
Capsules
85Good qualityMade in USA8.3¢per 100 mg
796% more
- Pack
- $10.00120 capsules
- Vitamin B1 per serving
- 100 mgin 1 capsule
- Pack lasts
- 120 daysif you take 1 capsule (100 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 39
BulkSupplements
Benfotiamine Powder
Powder
80Good qualityCountry not stated8.4¢per 100 mg
800% more
- Pack
- $20.97167 servings
- Vitamin B1 per serving
- 150 mg
- Pack lasts
- 250 daysif you take 100 mg a day
bulksupplements.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 40
Nature's Truth
Benfotiamine (Fat Soluble Vitamin B-1) 300 mg
Capsules
80Good qualityCountry not stated8.6¢per 100 mg
826% more
- Pack
- $15.4960 capsules
- Vitamin B1 per serving
- 300 mgin 1 capsule
- Pack lasts
- 60 daysif you take 1 capsule (300 mg) a day
naturestruth.com (opens in a new tab)Checked Nov 1, 2026 · Label
Good to know
- Fact
- 20,740%more per 100 mg for the most expensive product than for the cheapest.
- Fact
- 384%more per 100 mg for the cheapest softgels than for the cheapest powder.
How we checked: one-time price for each size in the store’s US online shop, before sales tax and shipping, without subscriptions or coupons. Prices change often, so check the store before you buy. More on how we check
The amount we compare by only makes products comparable – it is not a dosage recommendation. Not medical advice.
How we calculate
Cost per dose = price ÷ (servings × amount per serving) × comparison amount. Example: $119.99 for 74 servings with 24 g of protein each is 1,776 g of protein. $119.99 ÷ 1,776 g × 30 g = $2.03 per 30 g of protein.
Found a mistake or a product we should add? Email us