Vitamin B1 (thiamin/thiamine) supplements with the fewest additives

Vitamin B1 may be helpful for fighting kidney disease, preventing cataracts, and more. However, many vitamin B1 supplements contain more than just B1. For example, silica or silicon dioxide are often added to prevent caking.

I try to avoid these additives because they may have questionable health effects. If you want to do the same, my recommendations for the purest vitamin B1 (thiamin) supplements are:

Suggestion for a minimal-excipient B1 capsule:

Swanson Premium Vitamin B1 (Gelatin Capsules)
Available on SwansonVitamins.com
Positives:
  • silica-free / silicon-dioxide-free
Negatives:
(none)
All ingredients:

Thiamin USP (as thiamin HCl), rice flour, gelatin, stearic acid.

I'm not concerned with the amount of stearic acid that's probably in this brand (see my stearic acid page), but please leave a comment if you find a brand without it.

Suggestion for straight no-excipient B1 powders:

PureBulk Vitamin B1 (Powder)
Available on PureBulk

Also available in Thiamine Mononitrate form.

Positives:
  • silica-free / silicon-dioxide-free
Negatives:
(none)
All ingredients:

Vitamin B1 (as thiamine HCl).

Vitaspace B1 (Powder)
Available on Vitaspace

(requires a large minimum purchase)

Positives:
  • silica-free / silicon-dioxide-free
Negatives:
(none)
All ingredients:

Vitamin B1 (as thiamine HCl).

In the UK?

Health Monthly has the Swanson B1 for a reasonable price. PureBulk will also ship internationally.

There's also a decent liquid product from Epigenetics, but it contains citric acid:

Epigenetics Vitamin B1 Thiamine (Liquid)
Available on epigenetics-international.com
Positives:
  • silica-free / silicon-dioxide-free
Negatives:
  • contains citric acid
All ingredients:

Thiamine hydrochloride, purified water, citric acid.

Outside the US/UK?

Swanson will ship the recommended capsule for $5 plus their actual freight costs. PureBulk will also ship internationally.

If you frequently need US-based products, Reship.com and MyUS.com can forward packages to you from the US.

If you find a better option in your country, please let me know in the comments.


Other vitamin B1 (thiamin) supplements

The following are other vitamin B1 (thiamin) supplements I'm aware of, sorted alphabetically.

Name Ingredients
21st Century Health Care B-1 (Tablets)

Thiamin (as thiamin HCL), calcium (as calcium carbonate), cellulose, croscarmellose sodium, stearic acid, silicon dioxide, magnesium stearate.

BigBulk Vitamin B1 (Gelatin Capsules)

Thiamin USP (as Thiamin HCl), gelatin, microcrystalline cellulose.

Bluebonnet Nutrition Vitamin B-1 (Veggie Capsules)

Vitamin B-1 (thiamine HCl), 100% kosher vegetable capsules, vegetable cellulose, vegetable magnesium stearate.

Cardiovascular Research Ltd. Ecological Formulas Allithiamine (Capsules)

Thiamine (TTFD) (as thiamin tetrahydrofurfuryl disulfide), calcium (as dicalcium phosphate), phosphorus (as dicalcium phosphate), gelatin, microcrystalline cellulose, magnesium stearate, silicon dioxide.

Cardiovascular Research Ltd. Lipothiamine (Tablets)

Thiamine tetrahydrofurfuryl disulfide (vit. b1), alpha lipoic acid (thioctic acid), dicalcium phosphate, cellulose derivatives, magnesium stearate, silicon dioxide, sodium alginate, stearic acid, ammonium hydroxide, medium chain triglycerides, oleic acid.

Carlson Labs B-1 (Tablets)

Thiamin (as thiamin hydrochloride), dicalcium phosphate, microcrystalline cellulose, croscarmellose sodium, stearic acid (vegetable source), magnesium stearate (vegetable source), silicon dioxide. May contain methylcellulose. May contain ethylcellulose.

Country Life Gluten Free Vitamin B-1 (Tablets)

Thiamin (as thiamine hydrochloride), cellulose, stearic acid, silica, magnesium stearate, vegetable glaze.

Natrol Vitamin B-1 (Capsules)

Thiamin (from thiamin mononitrate), cellulose, gelatin, water, stearic acid, magnesium stearate, silica.

Nature's Bounty Vitamin B-1 (Tablets)

Thiamin (as thiamin hydrochloride), dicalcium phosphate, vegetable cellulose, vegetable stearic acid, silica, vegetable magnesium stearate.

Nature's Way Vitamin B-1 (Capsules)

Thiamin (as thiamin HCl), millet, maltodextrin, gelatin (capsule), magnesium stearate.

Now Foods B-1 (Tablets)

Thiamine (as thiamine HCl), cellulose, stearic acid (vegetable source) and magnesium stearate (vegetable source).

Rexall Sundown Naturals High Potency B-1 Thiamin (Tablets)

Thiamin (as thiamin hydrochloride), dicalcium phosphate, vegetable cellulose, vegetable stearic acid, silica, vegetable magnesium stearate.

Solgar Vitamin B1 (Veggie Capsules)

Vitamin B1 (as thiamin HCl), vegetable cellulose, silica, vegetable magnesium stearate, microcrystalline cellulose.

Source Naturals B-1 High Potency (Tablets)

Thiamin, magnesium (as magnesium citrate, malate, oxide & succinate), stearic acid, modified cellulose gum, acacia gum, magnesium stearate, and silica.

Source Naturals B-1 Thiamin (Tablets)

Thiamin, calcium, dibasic calcium phosphate, stearic acid, modified cellulose gum, and silica.

Source Naturals Coenzymated B-1 (Tablets)

Thiamin (from cocarboxylase [coenzymated]), sorbitol, mannitol, sodium citrate, natural peppermint flavor, and magnesium stearate.

Spring Valley Natural B1 (Tablets)

Vitamin B1 (as thiamin mononitrate), calcium (as calcium carbonate), cellulose, maltodextrin, hydroxypropyl methylcellulose, magnesium stearate, croscarmellose sodicum.

Twinlab B-1 Caps (Capsules)

Thiamin (as thiamin mononitrate), gelatin, cellulose, purified water, medium chain triglycerides, magnesium stearate, silica.


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