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Recommend a Supplement

In order to help you find a good product, we’ve researched & narrowed down the best vitamin B1 supplements on the market right now.

Top 10 Vitamin B1 Products Compared

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1. Solgar – Vitamin B1

Solgar - Vitamin B1

Solgar Vitamin B1 offers 500mg of thiamine, making it a very strong option. It’s made by a reputable company and offered at a great price – especially when you consider the high potency.


  • 500mg vitamin B1 per serving
  • Free of gluten, wheat, dairy, soy, and most common allergens
  • A concentrated, potent dose
  • Vegan-friendly
  • Great price
  • Great reviews

Who Makes It?

Solgar is a large-scale supplement and health product manufacturer that was founded in 1947. With decades in the industry, the New Jersey-based firm has developed a great reputation for consistently high quality and affordable products.

Bottom Line

This is a powerful thiamine supplement, and one of the best on this list. If you’re looking for something with a high vitamin b1 dosage, look no further.

Where to Get It

2. Nutricost Vitamin B1

Nutricost Vitamin B1

Nutricost Vitamin B1 is a strong thiamine supplement with a whopping 500mg per serving and It’s made in the USA.


  • 500mg vitamin B1 per serving
  • Made in the USA
  • Non-GMO
  • Gluten-free
  • Expensive

Who Makes It?

Nutricost is a large producer of health products and supplements. They primarily sell online.

Bottom Line

This is a good product for those seeking a strong dosage of B1. It is rather expensive on a per-serving basis, but then again, the servings are much more potent than the average thiamine supplement.

Where to Get It

3. NOW Foods Vitamin B1

NOW Foods Vitamin B-1

NOW Foods Vitamin B1 is a great product from a great company. Offering 100mg of B1 in each serving, it offers a standardized dosage without unnecessary fillers.


  • 100mg B1 per serving
  • Free of gluten, sugar, salt, starch, yeast, dairy soy and most other allergens
  • Vegetarian and vegan
  • Made by one of the largest health product companies
  • Great reviews
  • Affordable

Who Makes It?

NOW Foods is a massive health products company headquartered in Illinois, USA. They offer a staggering 1,400+ products and boast the widest product lineup of any company in the industry. Not only that, but they are known to stand behind their products, and dedicate significant resources to ensuring their offerings are of the highest quality possible.

Bottom Line

This is a great product and our top choice for anyone seeking a standard 100mg dose. It’s a very affordable option, as well, and is made by a name you can trust.

Where to Get It

4. Source Naturals Vitamin B1

Source Naturals Vitamin B1

Source Naturals Vitamin B1 is a high-quality thiamine supplement containing both vitamin B1 and calcium.


  • 100mg vitamin B1 per serving
  • 35mg calcium
  • 250 tablets per bottle
  • A bit expensive

Who Makes It?

Source Naturals is a health and wellness company that was founded in 1982. Today, they offer over 600 unique products to serve their customers’ needs.

Bottom Line

This is a good product combining vitamin B1 and calcium, although the calcium dosage is so small it’s unlikely to provide much value. It’s a bit expensive.

Where to Get It

5. BulkSupplements Pure Thiamine HCL

BulkSupplements Pure Thiamine HCL (Vitamin B1) Powder

BulkSupplements Pure Vitamin B1 is a bulk packaged product offering pure B1, with nothing else in it. Most supplements will have at least some sort of filler or binding agent, but this is just a big bag of pure thiamine mononitrate (vitamin B1).


  • 101mg vitamin B1 per serving
  • PURE thiamine mononitrate, with no other ingredients
  • Bulk packaging – not in capsules, just plain powder
  • Very economical
  • Lab-tested for guaranteed purity

Who Makes It?

BulkSupplements, as their name suggests, is a wholesale retailer and manufacturer of supplement products. They sell simple, pure products at rock-bottom prices, typically just packaged in plain bags. This allows them to offer extremely low prices while maintaining excellent product quality.

Bottom Line

If you don’t mind measuring out your own servings or filling your own capsules, this is a great choice. The price might seem high until you realize that a single package contains 4,000 servings! It’s also the cleanest product on this list since it includes literally nothing besides vitamin B1.

Where to Get It

6. Swanson Vitamin B1 (Thiamin)

Swanson Vitamin B-1 (Thiamin)

Swanson Vitamin B1 is a simple product offering the standard dose of thiamine. It utilizes thiamine HCL, at 100mg per serving.


  • 100mg vitamin B1 per serving
  • Guaranteed potency and purity
  • Only other ingredients are rice flour and gelatin
  • 250 capsules per bottle
  • Expensive

Who Makes It?

Swanson Health Products is a North Dakota-based supplement company with nearly 50 years in the industry.

Bottom Line

This is a good product with the standard recommended dosage size – but it’s a bit pricey.

Where to Get It

7. Nature Made Vitamin B1

Nature Made Vitamin B1

NatureMade Vitamin B1 is a simple and effective thiamine supplement from a well-known company. Offering the standard dose of 100mg at a very reasonable price, this is an all-around great product.


  • 100mg vitamin B1 per serving
  • No artificial flavors, colors or preservatives
  • No yeast, gluten or chemical solvents
  • Sold in a pack of 3 bottles

Who Makes It?

NatureMade is a division of Pharmavite, a vitamin and supplement manufacturer founded in 1971. They produce a wide range of great products, and you can find their offerings on store shelves worldwide.

Bottom Line

This is a good product at a fairly good price. The only downside is that it’s sold in a 3 pack, so you have to stock up a bit.

Where to Get It

8. Solaray B1 Supplement

Solaray Vitamin B 1

Solaray Vitamin B1 is a simple and pure product offering 100mg of thiamine in each serving.


  • 100mg vitamin B1 per serving
  • Whole food base mixture
  • Affordable
  • Contains some fillers

Who Makes It?

Solaray is a division of Nutraceutical, a large-scale health product company with over 1,000 products on the market.

Bottom Line

This is a good supplement overall. It utilizes a “whole foods base” which is intended to aid in the absorption of the B1 (although this claim has not been verified). It has some fillers.

Where to Get It

9. Mason Vitamins B1

Mason Vitamins B1

Mason Vitamins B1 is a strong vitamin B1 supplement offering 250mg of thiamine in each serving.


  • 250mg vitamin B1 per serving
  • Lab-tested for purity
  • Contains lactose (milk products)

Who Makes It?

Mason Vitamins is a USA-based manufacturer and distributor of vitamins. They currently offer more than 450 different products.

Bottom Line

If you want a high dosage, this is a good choice. That said, it contains lactose, so anyone who is lactose intolerant should avoid this product.

Where to Get It

10. Seeking Health Thiamine

Seeking Health Thiamine

Seeking Health Thiamine is a simple product offering a relatively small dosage of 50mg per serving. This could allow for more customization in doses, although the product is on the pricey side.


  • 50mg vitamin B1 per serving
  • Customizable doses due to small serving size
  • Vegetarian capsules
  • Very expensive

Who Makes It?

Seeking Health is a health product manufacturer based in Bellingham, Washington. They were named one of INC’s fastest-growing private companies for three years in a row.

Bottom Line

This is a good product from a good company, but the small dose and high price are significant downsides.

Where to Get It

Frequently Asked Questions About Vitamin B1 Supplements

What is Vitamin B1?

Vitamin B1, otherwise known as thiamine, is a nutrient that’s part of the B-family of vitamins. It is found naturally in some foods, including yeast, beans, nuts, and meat. It’s also commonly found in vitamin blends, such as multivitamins and B-vitamin complexes. You can also find thiamine supplements on their own, in individual formulations.

Thiamine has a number of important effects on the body, as outlined in the uses section below.

What Are the Uses & Benefits of Vitamin B1

Vitamin B1 has been studied extensively in clinical trials. Some of the most important vitamin B1 benefits and uses that have been identified include:

  • Thiamine deficiency – taking oral thiamine supplements can help to fight against thiamine deficiencies. Thiamine deficiency is not common in the west but is an issue in many areas of the world.
  • Metabolic disorders – some inherited metabolic disorders, including Leigh’s disease and branched-chain ketoaciduria can be corrected by the use of oral thiamine supplements.
  • Cataracts – an Australian study with 2,900 participants looked at the relationship between cataracts and diets, and found that diets higher in certain nutrients – including thiamine and protein – lead to a decreased risk of cataracts. However, this study did not isolate thiamine as a sole contributor to this result.
  • Kidney disease – a university study found that vitamin B1 supplementation could potentially reverse the early-stage onset of kidney disease in diabetic patients. However, this study looked solely at diabetic patients, and its results have not been duplicated in other reputable studies.
  • Painful menstruation – a 1996 Indian study examined over 500 young women with primary (spasmodic) dysmenorrhoea, or painful menstruation. When the participants were given oral vitamin B1 supplements, 87 percent reported significant improvements in their symptoms. These results have yet to be verified by additional studies.
  • Alcoholism – individuals with high alcohol consumption tend to be more at risk for B vitamin deficiencies and thiamine deficiencies. Therefore, thiamine supplements are often recommended for alcoholic patients.
  • Energy – many manufacturers and marketers of thiamine supplements claim that the vitamin has a positive effect on energy production, although this claim has not been definitively verified. B vitamins, including B1, are essential for the production of ATP, which the body uses for energy, but it’s unclear if oral thiamine supplements boost this effect or not.
  • Other uses – vitamin b1 has many other purported benefits that have not been definitively verified in clinical trials. Some of these uses include addressing symptoms related to aging, brain conditions, heart disease, and more.

How Do I Take Vitamin B1?

Vitamin B1 comes in supplement form, typically packaged in capsules. It can be taken with or without food, once per day. Most manufacturers recommend a dose of 100mg per day, although the official government RDA’s are much lower than that. The official recommended daily allowance for thiamine is only about 1mg per day.

MedlinePlus lists recommended vitamin B1 dosage amounts for specific applications ranging from as low as 5mg per day to upwards of 4,000mg, while recommends a range of 100mg to 300mg per day. So, there’s quite a range in recommended dosages – but here’s the good news: vitamin B1 is water-soluble, so it’s nearly impossible to take too much of it. If you ingest more than your body needs, you will simply excrete the excess in your urine.

Are There Any Side Effects of Vitamin B1?

Thiamine side effects are typically mild and may include nausea, sweating, a tight feeling in the throat, mild rash, restlessness, or itching. In rare cases, allergic reactions are possible.

If you are pregnant or breastfeeding, you should speak to your doctor before taking thiamine. While the supplement has been found likely safe for pregnant women when taken in low doses of up to 1.4mg per day, there is insufficient evidence to determine the safety of taking larger doses.

How Do I Pick a Good Vitamin B1 Product?

When choosing the right vitamin B1 supplement, you’ll want to focus on a number of factors. First and foremost, you should choose a product from a reputable company that has a reputation for consistency and quality.

You should also look for an option with minimal fillers and unnecessary ingredients. Lastly, you should choose a product that’s offered at a fair price and offers good value for your needs and budget.

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