Thiamine was the first B vitamin to be identified, hence its name vitamin B1. It acts as a coenzyme in several key metabolic reactions, notably converting carbohydrates into usable cellular energy. Natural sources include whole grains, legumes, nutritional yeast and lean pork, but refining, prolonged cooking, regular alcohol consumption or restrictive diets can reduce actual intake. A 100 mg supplement helps secure a reliable daily intake, and being water-soluble, any excess is naturally cleared through the urine, making thiamine well tolerated even at generous doses.

Compare all the options in our vitamin B1 range in store.

Under EU-authorised health claims, thiamine contributes to normal energy metabolism, to the normal function of the nervous system, to normal psychological function (including concentration and mood), and to normal function of the heart. For people with an active lifestyle or an intense training routine, exercise increases B-vitamin requirements, making a reliable thiamine intake particularly relevant.

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Now Foods is an American laboratory founded in 1968, known for the quality and transparency of its supplements, all produced in GMP-certified facilities. Each tablet delivers 100 mg of thiamine as thiamine hydrochloride, a stable, well-absorbed form. The formula is vegan, non-GMO, and free from gluten, soy and dairy. The bottle of 100 tablets covers more than three months at one tablet a day.

Take 1 tablet per day, ideally with a meal to support absorption and reduce any digestive discomfort, though thiamine is generally very well tolerated. It pairs well with other B vitamins, particularly B6, B12 and magnesium.

Food supplement. Not a substitute for a varied, balanced diet and a healthy lifestyle. Do not exceed the recommended daily dose. If pregnant, breastfeeding, or taking medication, consult a healthcare professional before use. Store in a cool, dry place, away from light and out of reach of children.

Where can I buy vitamin B1 thiamine in Paris?

Herba Barona, in the 12th arrondissement of Paris, stocks this Now Foods supplement along with a wide range of vitamins and supplements. Our team is on hand in-store to help you choose and answer your questions.

Can vitamin B1 be combined with other supplements?

Yes. Vitamin B1 pairs naturally with other B vitamins and works well alongside magnesium, which is also involved in energy metabolism and nervous system function. Ask our team at Herba Barona for advice on building a routine suited to your needs.

Is vitamin B1 suitable for vegetarians and vegans?

Yes, this Now Foods Vitamin B1 supplement is certified vegan, contains no animal-derived ingredients, and is well suited to vegetarian and vegan diets — a nutrient especially relevant since some of the best dietary sources of B1 are animal-based.

Herba Barona is an independent specialist supplement shop in the heart of Paris — established in 2006. What you order is genuinely on our shelves: we ship from our own stock, with no dropshipping and no long waits.

Visit us at 10 rue Théophile Roussel, Paris 12 — or use Click & Collect and pick up your order in-store. We also deliver across France and Europe. Friendly, expert advice in English from our team.

Where is the shop?

Herba Barona is at 10 rue Théophile Roussel, 75012 Paris — a two-minute walk from Ledru-Rollin (line 8), close to Bastille. Open Tuesday to Saturday, 9:30 am–6:30 pm.

Can I order online or collect in store?

Yes. We ship across France and Europe under the same conditions as our French store, or choose Click & Collect to pick up your order for free at our Paris shop.