Thiamine Mononitrate (Vitamin B1)



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Supplement Facts & Directions

Supplement Facts

Serving Size: 125 milligrams
Servings Per Container: Varies
Amount Per Serving % Daily Value*
Thiamine (Vitamin B1) (from Thiamine Mononitrate) 115 mg 7657%

* Percent Daily Values are based on a 2,000 calorie diet.
† Daily Value Not Established
‡ These supplement facts may vary from the product you receive. Please call for exact numbers.

Other Ingredients: None


Free of: Added Sugar, Soy, Dairy, Yeast, Gluten, Corn & Additives.

Directions: As a dietary supplement, take 125 mg daily or as directed by a physician. An accurate gram weight scale is recommended.

Warning: If you are pregnant, nursing, taking any medications or have any medical condition consult your physician before use. Keep out of reach of children.

Product Details

What is Thiamine Mononitrate?

Thiamine mononitrate is a nitrate salt form of Vitamin B1. The food and drug industries use thiamine mononitrate in supplements and foods as it is a stable form that can counteract the loss of vitamin B1 during processing. Like all B vitamins, thiamine mononitrate is water-soluble and an essential nutrient. Scientists named it vitamin B1 in 1910, as it was the first identified water-soluble vitamin. It is a prerequisite for every cell in the body to produce adenosine triphosphate (ATP), the body’s primary fuel source for energy. It’s also crucial for proper nerve function and metabolizing carbohydrates, fatty acids, glucose, and branched-chain amino acids (BCAAs).

Potential Thiamine Benefits

Thiamine mononitrate is a critical factor for producing cellular energy. It is a cofactor for pyruvate dehydrogenase and 2-oxoglutarate dehydrogenase. The body uses these enzymes to synthesize ATP for cells to use as energy. The body can also store ATP as energy for future use.

Vitamin B1 plays several important digestive and metabolic roles. It is an essential cofactor for enzymes that metabolize carbs, lipids, BCAAs, and glucose. Thiamine plays a role in breaking down proteins too. It also stimulates hydrochloric acid production for better digestion.

Vitamin B1 is important for a robust immune system. Stressful conditions and circumstances can weaken the immune system, but thiamine boosts immunity by strengthening its resistance and endurance during these situations. Unsurprisingly, thiamine deficiencies decrease the effectiveness of immune system functions.

Thiamine is an essential component of maintaining a healthy central nervous system. It supports numerous cognitive functions, and it’s critical to form the myelin sheaths that protect nerves. Without sufficient thiamine, individuals may begin to experience neurological symptoms.

Thiamine Deficiency Symptoms

The richest food sources of thiamine include yeast, whole grains, pork, legumes, and some fruits. Certain risk factors put individuals at a higher risk of developing a thiamine deficiency. These include:

  • Eating a white rice-based diet
  • Regularly consuming raw fish or shellfish
  • Dialysis
  • Drinking a lot of coffee or tea
  • Taking large doses of diuretics
  • Long-term diarrhea
  • Alcohol misuse
  • Genetic conditions that inhibit thiamine absorption
  • Gastrointestinal diseases that affect nutrient absorption (i.e., celiac disease)
  • Diabetes
  • Weight loss surgery
  • Thiamine malabsorption due to natural aging processes

Thiamine deficiencies can remain undiagnosed for a long time, as the symptoms are often vague or mimic other health conditions. Some common signs of a deficiency include:

  • Fatigue. A thiamine deficiency can cause fatigue within a few weeks, as the body needs vitamin B1 to produce energy.
  • Loss of appetite. An abrupt loss of appetite is one of the first markers of a thiamine deficiency. Thiamine helps the brain transmit hunger and satiety cues. A thiamine deficiency disrupts this process, and the brain may signal that the individual is full even if this is not the case. Consuming fewer nutrients through food can cause other deficiencies as well.
  • Losing weight without trying. Eating less often translates into unintentional weight loss. Losing too much weight too quickly can wreak havoc on the metabolism. It can also cause several health problems if the individual becomes underweight.
  • Neurological symptoms. Individuals with a thiamine deficiency can experience an array of neurological problems. They may suffer from brain fog, have difficulty concentrating, or struggle to think clearly. Severe deficiencies can cause memory loss and hallucinations. Neuropathy is also common, and it is the most well-known thiamine deficiency symptom. Individuals with neuropathy may experience pins and needles in their hands and feet, tingling extremities, loss of sensation in their hands, and loss of coordination.

Potential Thiamine Side Effects

Most individuals tolerate thiamine mononitrate well. As a water-soluble vitamin, the body excretes any excess thiamine it doesn’t need. However, consuming excessive thiamine doses can have serious side effects. Individuals with a sensitivity to vitamin B1 may experience hives, itching, flushing, or nausea after taking supplements. Consult with a physician before taking any new supplements.


Tested by Accredited 3rd Party Labs

This PureBulk product is manufactured in a cGMP registered facility. PureBulk's supplements are tested by accredited third party labs in the USA to ensure their identity, purity and potency. To receive a copy of these test results or any other PureBulk supplement please fill out the COA request form found here.

*NOTE: These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

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