SKU: 42507497563

Vitamin B1 (Thiamin), 400 mg 100 capsules

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Description

Vitamin B1 (Thiamin), 400 mg 100 capsulesVitamin B1 (Thiamin) Benefits and Uses Nothing but active ingredients Helps maintain energy level* Supports nervous system function* Promotes proper heart function* Vitamin B1, also known as thiamine, was one of the first organic compounds to be recognized as a vitamin. Like all the other B complex vitamins, it is water soluble and not stored in the body. Rather, excess amounts of B1 will be excreted. And like the other B vitamins, it helps the body

Vitamin B1 (Thiamin) Benefits and Uses

  • Nothing but active ingredients
  • Helps maintain energy level*
  • Supports nervous system function*
  • Promotes proper heart function*

Vitamin B1, also known as thiamine, was one of the first organic compounds to be recognized as a vitamin. Like all the other B complex vitamins, it is water soluble and not stored in the body. Rather, excess amounts of B1 will be excreted. And like the other B vitamins, it helps the body convert the foods we eat into usable fuel to maintain life-sustaining functions.

Vitamin B1 must be in adequate supply for aerobic energy production to take place. This is the process in which sugar (glucose) is converted into usable energy.

Vitamin B1 also plays roles in the nervous system. It promotes the healthy development of myelin sheaths, the material that surrounds and protects most nerves. Insufficient vitamin B1 intake can result in degradation and damage to the myelin sheath. Symptoms such as pain, prickly sensation, and deadened nerves may be linked to a vitamin B1 deficiency.*

Thiamine is needed for the production of acetylcholine, a neurotransmitter that relays messages between the nerves and the muscles. Acetylcholine’s importance in maintaining muscle tone makes vitamin B1 a significant nutrient in maintaining proper heart function because the heart is a muscle whose performance is vital to human life.*

Absorption of vitamin B1 requires sufficient supplies of vitamin B6, B12, and folic acid.


Ingredients
Vitamin B1 (as thiamine hydrochloride), gelatin (bovine) capsule

Suggested Use
Adults and children 12 years or over, take 1 capsule daily with a meal or as directed by a healthcare professional.

Store at room temperature. Keep out of reach of children.


Frequently Asked Questions
Q: What is the capsule size?
A: Capsule size 00.

Q: What type of capsule does this product come in?
A: This comes in a gelatin capsule. The gelatin is derived from bovine hide (beef skin).

Related Articles: Vitamin B Fact Sheet


Why Choose Us? With over three decades of unparalleled experience in the health and wellness industry, Dr. Clark Store stands out as a beacon of trust and quality. Unlike others, we are the actual manufacturers who take pride in our craft, overseeing the entire production process to ensure that each bottle meets our high standards. With more than 31 years of expertise and over 10 million bottles produced, you can rest assured that you're choosing a partner dedicated to authentic wellness. We don’t outsource to the lowest bidder.

Guaranteed Authenticity: Every batch of Vitamin B1 is carefully sourced and undergoes rigorous testing for ID, purity, potency, and microbiology before, during, and after manufacturing.

Just Pure Ingredients: At Dr. Clark Store, we stand against adulteration. Our rigorous testing reveals that an estimated 30% of bulk supplement powders in the U.S. market contain added fillers and/or come from incorrect species or plant parts. Unlike importers who operate according to FDA 21 CFR 117 and often rely on analyses done by the manufacturer abroad, we conduct thorough tests on all incoming materials in our full-size laboratory, guaranteeing the integrity of our products.

Carrageenan and Surfactant-Free Capsules: FDA regulation 21 CFR 101.100(a)(3)(ii) allows manufacturers to avoid disclosing ingredients in food if present at “insignificant” levels. This is why "Veggie Capsules" may contain carrageenan. Dr. Clark Store ensures the use of only the finest BSE-free gelatin capsules, free from carrageenan, surfactants, and prion risks. Our dedication to purity dates back over 30 years, ensuring safety and quality in line with Dr. Hulda Clark's original vision.

No Magnesium Stearate and No Hidden Processing Aids: True to Dr. Clark's vision, we never use magnesium stearate or any toxic processing aids in our products. Our commitment to transparency means all ingredients are clearly declared on the label, offering you peace of mind and a product you can trust. Again because of FDA’s lacking regulation 21 CFR 101, many brands contain magnesium stearate without it being declared on the label.

Verifiable GMP Certification: Trust is earned, not given. That's why we back up our GMP certification claims with verifiable evidence. Partnering with VeriGMP®, a UL-certified company, we adhere to strict GMP quality systems, ensuring that each product meets the highest standards of manufacturing and quality assurance.

Choose Dr. Clark Store for your vitamin supplement needs and experience the purity and authenticity that only comes from a legacy of passion and excellence in natural wellness.


*Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any diseases. As with any dietary supplement, you should consult with a qualified healthcare professional if you are pregnant or nursing, if you have any medical condition, or if you are taking any medication before using this product. Always consult with a healthcare professional before giving supplements to children. Please read full disclaimer here.
Coupon (discount) codes are not applicable on product subscriptions. The subscription price is already discounted from the one time purchase price.

Supports Energy Metabolism

Vitamin B1, also known as Thiamin, plays an essential role in converting carbohydrates into energy. It helps your body use glucose, which is crucial for maintaining energy levels throughout the day. When you take Vitamin B1 supplements, you're not only supporting your energy metabolism but also enhancing your overall vitality. This is especially important for individuals with increased energy demands, such as athletes or those with active lifestyles.

Promotes Healthy Nervous System

The importance of Vitamin B1 extends beyond energy. It is vital for the proper functioning of the nervous system. Thiamin helps to maintain healthy nerve function and can enhance cognitive performance. This makes it an important nutrient for students or anyone looking to support their focus and mental clarity. Ensuring adequate levels of Vitamin B1 in your diet can help keep your nervous system functioning optimally.

Supports Heart Health

Vitamin B1 also plays a crucial role in promoting heart health. It contributes to the proper functioning of the heart muscle and helps regulate cardiovascular health. By incorporating Vitamin B1 supplements into your routine, you can support your heart’s health and improve your overall well-being. A healthy heart is essential for maintaining energy levels, managing stress, and living a healthy life.


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SKU: 42507497563

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4.1 ★★★★★
Based on 28 reviews
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Verified Purchase
Virginia C.
Boise, US
★★★★★ 5
A quick private space
Color: Black, Size: Standard - 4 Panel
Went together easily, just the right height and width for just a bit of privacy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 3, 2026
A
Amazon Customer
Bozeman, US
★★★★★ 5
Versatile Room Divider With Easy Assembly and Strong Coverage
Size: 3 Panel 12FT W
I picked up this Siebwin 3-panel folding room divider mainly for privacy and room separation, and overall it works very well. Assembly is very straightforward, and the divider can be set up, taken apart, and stored without much effort. The fabric quality feels good, and the frame construction is stronger and more stable than expected. The support tubes especially feel well built and help keep the divider standing securely. One feature I really liked is the flexibility of the design. The panels can be used together as a complete divider or separated depending on the setup and available space. That makes it much more versatile for different room layouts or temporary privacy needs. The coverage is also very good, and the size matches the manufacturer’s description accurately. The fabric blocks light and background visibility well enough to provide solid privacy without feeling overly heavy. The wider feet also help improve stability compared to thinner folding dividers. Another positive detail is that everything arrived complete with no missing parts or damaged pieces, which made assembly much easier and faster. Compared to cheaper privacy screens, this one feels more durable and easier to customize depending on the situation. In terms of value for the money, it feels like a very practical and worthwhile purchase considering the size, flexibility, and build quality. Overall, a versatile and well-built room divider with easy assembly, strong privacy coverage, stable construction, complete included parts, flexible panel configuration, and excellent everyday functionality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
F
Fred
Phoenix, US
★★★★★ 5
Stable, flexible in deployment configuration, creates true privacy and looks great.
Size: 3 Panel 12FT W
This is the second room divider panel I have installed, and there are several features about this one that I like much better than my older one. The fact that there are no gaps and that the material is thicker means you get more privacy or more hiding power, if you wish. My older divider has vertical spaces between each of the panels and the panels are half as wide as the Siebwin panels, so there are many vertical spaces. The Siebwin divider really creates privacy. Another feature that I really appreciate is that the legs are wider and stand off from the floor. On my older one the legs are flat and they're rather awkward to adjust because they create more drag on the floor. The feet on the older one also loosen if you turn them counter clockwise, so adjustments of configuration that require the feet to be moved are more complex. The older divider also must be deployed in a zig-zag fashion because he feet are not as wide, but this new one can be deployed and stable in a straight, an "N" shape or an arc. They are both the same length, but because the older one must be use in a zig-zag deployment it doesn't reach to the length of the new one. The Siebwin divider definitely costs more at $103.48, but it sports several features and advantages over the other brand, so it does a better job and is worth the extra cost.
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Reviewed in the United States on May 25, 2026
C
Computer
Omaha, US
★★★★★ 4
Easy to assemble, does the job, material is shiny nylon and shows creases, minor defects, sloppy
Size: 3 Panel 12FT W, Size: 3 Panel 12FT W
The Siebwin room divider is a good idea, and for the price, it mostly delivers on the intended functionality. I ordered the 12 foot, 3-panel version mainly to hide an unfinished basement storage area that had become an eyesore. It works well for that purpose and gives the space a cleaner appearance without spending the kind of money that more decorative dividers or custom partitions cost. If you need something temporary, portable, or mainly functional, this is a viable option. There are a few limitations that became obvious during setup and use. The first thing I noticed was that the weld quality on some of the metal poles is fairly sloppy. Once the cover is installed, you do not really see it, but up close, it does not look especially refined or professional. The blackout material also is not a matte canvas style fabric as I expected. It has more of a shiny nylon appearance, and the creases are fairly visible. Being that it’s more of a nylon, I’d be hesitant to try steaming it to remove the creases. However, the creases do not matter if you are using it in a basement, dorm, or shared room, but for photography, video work, or a professional office setting, the appearance could be disappointing. The fabric is thick enough, though. It blocks visibility well enough, but strong light behind it still shows through to some extent, nothing deal-breaking. Also, my fabric appeared to be slightly defective. The hook and loop strip on one of the bottom sections was off-center and couldn't be totally attached because it was lined up with one of the legs. I originally hoped to use this as a video backdrop, but I will probably end up replacing the fabric with a proper green screen or canvas material while continuing to use the frame itself. For now, it does a good job of covering my basement junk. Assembly was actually easier than I expected and took roughly 15 to 20 minutes. The longer vertical poles are tethered together similarly to tent poles, which made setup straightforward and fairly intuitive. The shorter horizontal pieces slide and snap together to the top and bottom of the vertical assembly. After each section is assembled, the divider panels connect together with metal plates and two knurled screws (at the top and bottom), so no tools are really required. A few screws were difficult to start because paint had gotten into the threads, but once they caught, they tightened down normally. The feet install with similar knurled fasteners and help keep the divider reasonably stable. One thing to watch for during setup is the fabric orientation. There is one arrow indicator in the middle of the fabric to indicate up. However, if you need another indicator, the smaller hook and loop strip goes on the bottom while the longer strip goes on top. I realized mine was upside down right before finishing and had to redo it. I wasn't difficult to redo, despite the defect in mine. The overall design is practical and easy to move around. I do like that the panels can fold and bend into different shapes depending on the space. The widened feet help stability, although when trying to stretch the fabric tight, I noticed the poles sometimes wanted to overlap slightly at the joints. Tightening everything helped somewhat, but it still happened occasionally. The divider feels adequate for normal indoor use, though I would not expect premium durability or luxury-level fit and finish at this price point. The entire device can also be easily disabled and stored in a tote if you need it completely out of the way. It comes with assembly instructions, but even if you didn’t have them, it’s easy to build without them (save a mistake or two). In terms of value, I think the Siebwin divider mostly matches its price. Around $100 gets you a large freestanding partition with decent usability and easy assembly, but there are compromises in materials, appearance, and refinement. The defects are also off-putting, but hopefully you won't have them. Higher-end room dividers can easily cost two or three times more, so some of the tradeoffs are expected. I also noticed cheaper alternatives online, but based on the quality here, I suspect those would probably have even more issues. For practical home use, temporary privacy, hiding storage areas, or separating shared spaces, this is a good option as long as expectations stay realistic.
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Reviewed in the United States on May 18, 2026
T
Trendy Tales
Lake Worth, US
★★★★★ 3
Works well but takes up more space than expected
Size: 2 Panel 8FT W, Size: 2 Panel 8FT W
This room divider does the job for creating a little extra privacy and was easy enough to set up. The panels feel decent quality and the wider feet help keep it more stable than some cheaper screens I’ve tried. My only issue is that it takes up a bit more room than I expected, especially with the feet sticking out. It’s still portable and folds away nicely, but definitely measure your space first. Overall it works well for separating a room or blocking off an area temporarily. i wish it came in other colors
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026

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