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Vitamin B1 (Thiamine HCL) Powder

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Vitamin B1 (Thiamine HCL) Powder

Key Features

  • Promotes mental wellness
  • Lab-tested & verified
  • Non-GMO
  • Taste

  • Mixability

Vitamin B1 provides the body with a source of Thiamine to use in the process of breaking down carbohydrates to be used as energy. Thiamine is also necessary for amino acids to be properly metabolized.


Serving Size & Timing

This supplement should be taken in serving sizes of up to 100mg per day, depending on intended effect and doctor’s recommendation.

Nutritional Information

Supplement Facts

Serving size: 100 milligrams
Serving per container: *
Amount Per Serving % Daily Value**
Thiamin (Vitamin B1) as Thiamine HCL... 100 mg 5933%
* Daily Value not established.
** Based on 2,000 calorie diet


Sugar, soy, dairy, yeast, gluten, corn and additives.

As a dietary supplement, take 50mg to 100mg (1/32 tsp to scant 1/16 tsp) daily, or as directed by physician. Individual needs vary.

US Standard Measuring Spoons
Spoon Size(level) milligrams
1/32 teaspoon 62
1/16 teaspoon 125
1/8 teaspoon 251



This Thiamine HCL supplement contains no fillers of any kind and contains at least 89% Thiamine. It is pharmaceutical grade, non-irradiated and vegan friendly.


Most of the main vitamins can never be consumed at high enough levels to actually warrant any kind of toxicity concern. However, excessive drinking, poor diet or liver problems may lead to a deficiency of Thiamine. Those who suffer from Thiamine deficiency may have symptoms such as gastrointestinal discomfort, indigestion, leg cramps, insomnia, muscle weakness, exhaustion, weight loss, constipation, irregular heartbeat and irritation. It may even disturb the flow of HCL production in the body, causing further digestion problems.


This supplement comes in the form of a crystalline powder with a slightly off-white or almost yellow hue. If the water is warm or hot, this supplement will dissolve easily. It may also be mixed with juice. B vitamins are known for working well with other B vitamins, so it may be best to take some Vitamin B2 and Vitamin B6 along with this supplement in order to maximize their effects.

Anyone that takes diuretic drinks such as alcohol or sodas should look into taking this supplement, as diuretics cause Vitamin B1 to be expelled from the bladder faster than normal. This product should be stored in an area that is free from light, heat and moisture in order to preserve potency and prevent degradation.

Customer Reviews

the thiamine seems to be helping with some of my nerve issues.

as with all BS packets, they need to start shipping them with the ziplocks sealed, as they currently ship them unsealed the fine powder gets in the lil groove and prevent you from sealing the ziplock.*

On 7/23/2016 Ryan said...

Vitamin B1
Great product, very strong. Bulk supplement is great with shipping, very fast.. *

On 7/4/2016 Mike said...

Thiamine HCL (Vitamin B1)

From the Linus Pauling Institute at [...] "The presence of anti-thiamin factors (ATF) in foods also contributes to the risk of thiamin deficiency. Certain plants contain ATF, which react with thiamin to form an oxidized, inactive product. Consuming large amounts of tea and coffee (including decaffeinated), as well as chewing tea leaves and betel nuts, have been associated with thiamin depletion in humans due to the presence of ATF. ATF include mycotoxins (molds) and thiaminases that break down thiamin in food. Individuals who habitually eat certain raw, fresh-water fish; raw shellfish; and ferns [Horsetail] are at higher risk of thiamin deficiency because these foods contain thiaminase that normally is inactivated by heat in cooking ..." I mention this because I am taking 440 mg/day of BulkSupplements Horsetail Extract. Also drink a lot of coffee.

The Institute also states, "The Food and Nutrition Board did not set a tolerable upper intake level (UL) for thiamin because there are no well-established toxic effects from consumption of excess thiamin in food or through long-term, oral supplementation (up to 200 mg/day)."

The following is a list of clinical trials, most double-blinded and placebo-controlled, recorded at the National Medical Library, MEDLINE, as abstracted by GreenMedInfo for thiamine (B-1):

1. Folate, riboflavin, thiamin and vitamin b12 protect against premalignant cervical lesions.
2. Heart failure patients have high rates of B-vitamin deficiency.
3. High-dose thiamine therapy (300 mg/day for three months) produced a regression of urinary albumin excretion in type 2 diabetic patients with microalbuminuria. There were no adverse effects of therapy.
4. Patients with congestive heart failure have high rates of thiamine deficiency.
5. Severe thiamine deficiency can result in Wernicke's encephalopathy in dialysis patients.
6. Thiamine deficiency may play an important etiologic role in the deterioration of cardiac function in some patients with congestive heart failure.
7. Thiamine has therapeutic value in the treatment of chronic hepatitis B infection.
8. Vitamin B12 and B1 deficiency may be associated with neurological symptoms such as Wernicke's encephalopathy and degeneration of the spinal cord.
9. Three patients on thyroid hormone replacement because of Hashimoto's thyroiditis were treated for the fatigue component of the disease from May to July 2011. Fatigue was measured using the Fatigue Severity Scale. Free thiamine in the serum and thiamine pyrophosphate in red cells were tested before and after the therapy. All three patients received oral (600'mg/day) or parenteral (100'mg/ml every four days) doses of thiamine. RESULTS: Treatment with thiamine led to partial or complete regression of the fatigue within a few hours or days.*

On 5/25/2016 Stephen said...

Vitamin B1
Vitamin B1 "Thiamin HCL" I believe have the potential of helping bad eye sight among other things. Great product. *

On 3/25/2016 Mike said...

CHF - this is a must
For those that have CHF (Congestive Heart Failure) this product is a MUST. *

On 10/8/2015 George said...

Excellent Energy Supplement
Since adding this supplement to my daily intake I have noticed a great increase in energy and focus. I add a scant 1/8 teaspoon into my amino drink each morning. It mixes well and has no taste. It has made a big difference in how I feel and the affect lasts all day. I will be purchasing this supplement again!*

On 9/23/2015 Edwina said...

Very effective
I was told by specialists in the field that cataracts will not go away and, at some point in time, they will have to surgically remove them. I learned, instead, through alternative integrative medicine that cataracts can be dissolved by nourishing your eyes and your brain with the right supplements.
I can now confirm such statement with full confidence. Indeed, after introducing Thiamine into my protocol, only a few days later, I am seeing huge improvements. I take this vitamin B1 along with Bilberry, ALA, and other supplements. I also noticed better energy and better focus.
I am definitely on the right track with Bulk Supplements.
It feels very good to know that not only you get what you pay for, in terms of purity, but also to know that you nourish your body with something very viable, not a bunch of magnesium stearate and silica (at best).. Thank you Bulk Supplements. *

On 7/24/2015 Gabriella said...

Bitter tasting
Large bag. Just started taking 500 mg a day so far my energy seems to be better than prior to taking the supplement. Good price and fast shipping.*

On 7/14/2015 Cindy said...

Thiamine HCL (B1)
The product is good but it came unsealed and some of the powder spilled. Also, a lot of the bags come with powder in the upper seal, so when you open it, you lose some. *

On 7/2/2015 Douglas said...

Fresh and pure
As the supply of each of our vitamin capsules runs out, I have been replenishing whenever possible here at Bulk Supplements. It has been great to get products without added fillers. The B1 we received was undoubtedly very fresh and pure. I will be ordering other B-vits here as soon as my capsules for those are depleted. Saying goodbye to eating a bunch of raw rice flour!*

On 6/3/2015 Thomas said...

B1 Vitamin
Wonderful Vitamin, Happy with the speedy delivery seeing results quickly *

On 4/2/2015 igor said...

I got vitamin B1 to see if it would indeed help with my foot pain, which has recently become a new challenge for me. I am happy to report it has worked! *

On 12/28/2014 Sheila said...

my very short review
this vitamin has been associated with neuroprotection; leading to less age related brain atrophy. The fight against dementia is a difficult one, and this vitamin, amongst various others certainly does a part in prevention.*

On 10/7/2014 mathieu chenier said...

Replacement of capsules
Thiamine HCl is just one of several items we are now taking in pure powder form rather than in capsules, most of which contain unwanted (some actually undesirable) fillers. (Unfortunately many items are currently only available in capsules which we are decapsulating, still containing the fillers obviously.) Additionally, since we take numerous supplements (we are serious life-extentionists), by using powders we can titrate their dosages in the respective morning, meals and nighttime combined powders, starting at low amounts and ramping up gradually. This last measure is one we hope will curb the tendency to diarrhea that has accompanied the ingestion of the very many supplements, encapsulated herbal extracts and chemicals we use daily. If it does, the 4 star rating will become 5 :)*

On 7/29/2014 Katherine Antonik said...

very happy with the speedy order fulfillment. My plan is to take this at max level so it will help things as specified and have enough in my body to repel mosquitoes (and maybe ticks, from a lyme disease sufferer).*

On 6/9/2014 Margaret said...

Small amount
I use this because I have severe allergies and I've been diagnosed with MS.
I follow Roger Mcdougalls regime.

This B1 mixes easy and is tolerated well.*

On 4/7/2014 Patricia said...

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