Vitamin B1 (thiamine): role and supplements

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Vitamin B1, or thiamin, is a water-soluble B vitamin that the body stores only in very small amounts. It must therefore be supplied regularly by the diet: yeast, wholegrain cereals, pulses, pork and oilseeds are good sources.

Discover its recognised benefits, where to find it in food, its forms in supplements and our selection.

Vitamin B1 (thiamine): role and supplements | NATURAMedicatrix

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Discover our top 3 products Vitamin B1 (Thiamine)

Alkalising Formula (powder – 300 g)

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Active ingredients guide

Vitamin B1 (thiamin): benefits, sources and supplements

Vitamin B1, or thiamin, was the first B vitamin to be identified. It was in fact while working on this substance that the biochemist Casimir Funk coined the word “vitamin” in 1912.

Being water-soluble, it is stored only to a very limited extent by the body, so it needs to be consumed regularly. In the cells, it is converted into thiamin pyrophosphate, its active form.

1.1 mg per day

The adult reference intake used on European labelling.

Limited reserves

The body stores only small amounts of it.

Sensitive to cooking

It breaks down with heat and leaches into cooking water.

Recognised benefits

The recognised benefits of vitamin B1

The European Union authorises four health claims for thiamin:

Energy

Thiamin contributes to normal energy-yielding metabolism.

Nervous system

Thiamin contributes to normal functioning of the nervous system.

Psychological function

Thiamin contributes to normal psychological function.

Heart

Thiamin contributes to the normal function of the heart.

Food sources

Where is vitamin B1 found in food?

The best sources are yeast (brewer’s or nutritional), wheat germ, wholegrain cereals, pork, pulses (lentils, peas, dried beans), sunflower seeds and nuts. Fish, eggs and potatoes also supply it.

Thiamin is concentrated in the outer layer and germ of grains: refining cereals (white rice, white flour) removes much of it. Long cooking in a lot of water also reduces the content of foods.

Forms and intake

Which form of thiamin is used in supplements?

Food supplements mainly use thiamin hydrochloride or thiamin mononitrate, two stable salts of vitamin B1. Once absorbed, thiamin is converted by the body into thiamin pyrophosphate.

The reference intake (RI) is 1.1 mg per day. A varied, minimally refined diet helps to cover it. When taking a supplement, do not exceed the daily dose stated on the label.

Buying guide

How to choose a vitamin B1 supplement?

The dosage

Expressed in milligrams and as a percentage of the reference intake.

The B complex

Thiamin is most often combined with the other B vitamins.

The format

Capsules, powder or liquid formula, depending on your habits.

Combined intake

Add up your intake if you take several supplements.

Our selection

Our supplements containing vitamin B1

Here are three formulas that provide at least 100% of the RI for thiamin. Find all our products containing vitamin B1 in the list above.

Multivitamines B-Methyl-Homocysteine — 60 capsules

1.1 mg of vitamin B1 per capsule (100% of the RI), as part of a complete vitamin B complex.

Discover Multivitamines B-Methyl →

B-Kudzu — 200 vegetable capsules

2.1 mg of thiamin per capsule, with the other B vitamins and a kudzu extract.

Discover B-Kudzu →

Nerfs sains — 100 vegetable capsules

1.1 mg of vitamin B1 and 6 mg of vitamin B5 per 4 capsules, with ashwagandha, rhodiola and reishi.

Discover Nerfs sains →

Frequently asked questions

Vitamin B1 FAQ

Are thiamin and vitamin B1 the same thing?

Yes. Thiamin is the chemical name for vitamin B1: both terms refer to the same molecule.

What are the benefits of vitamin B1?

Thiamin contributes to normal energy-yielding metabolism, to normal functioning of the nervous system, to normal psychological function and to the normal function of the heart.

What is thiamin mononitrate?

It is a thiamin salt, like thiamin hydrochloride. These two stable forms are commonly used in supplements and fortified foods.

Where can you buy vitamin B1?

In pharmacies, organic shops or online. At NATURAMedicatrix, vitamin B1 is available in vitamin B complexes and combined formulas.

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Vitamin B1 (thiamin): benefits, sources and supplements

The recognised benefits of vitamin B1

Energy

Nervous system

Psychological function

Heart

Where is vitamin B1 found in food?

Which form of thiamin is used in supplements?

How to choose a vitamin B1 supplement?

The dosage

The B complex

The format

Combined intake

Our supplements containing vitamin B1

Multivitamines B-Methyl-Homocysteine — 60 capsules

B-Kudzu — 200 vegetable capsules

Nerfs sains — 100 vegetable capsules

Vitamin B1 FAQ

Are thiamin and vitamin B1 the same thing?

What are the benefits of vitamin B1?

What is thiamin mononitrate?

Where can you buy vitamin B1?

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