• Nature Made B1 100mg
  • Nature Made B1 100mg

Vitamin B1 100 mg


Vitamin B1, or Thiamin, is vital for cellular energy production.

  • Helps convert food into cellular energy
  • Formulated for easy absorption

Product Details

Along with other B vitamins, Vitamin B1, or Thiamin, is vital for cellular energy production and normal nervous system function.

  • Helps convert food into cellular energy
  • Helps support normal functioning of the nervous system

Nature Made® Vitamin B1 100 mg is guaranteed to meet our high quality standards – it is made from carefully selected ingredients under strict manufacturing processes.

  • #1 Pharmacist Recommended Letter Vitamin Brand*
  • United States Pharmacopeia (USP) Verified
  • Formulated for easy absorption
  • No Artificial Colors or Flavors
  • No Preservatives
  • No Yeast or Starch
  • Gluten Free

Available Sizes: 100 Count

*Based on US News & World Report - Pharmacy Times Survey of pharmacist recommending in this category.

Nature Made When to Take Your Vitamins

Dosage and Interactions


Suggested Use: Take one tablet daily, with a meal.


Vitamin B1(thiamin) should be avoided when taking:

  • Current research does not indicate that this vitamin should be avoided when taking prescription drugs

Vitamin B1 (thiamin) should be used with caution when combined with:

  • Current research does not indicate that this vitamin should be used with caution when taking prescription drugs

Given that no two people are alike, if you are taking any medications you should be aware that potential drug-nutrient interactions may occur and are encouraged to consult a health care professional before using this product. Combining certain prescription drugs and dietary supplements can lead to undesirable effects such as:

  • Diminished drug effectiveness
  • Reduced supplement effectiveness
  • Impaired drug and/or supplement absorption


Is it better to take Thiamin (vitamin B1) by itself or with other B vitamins?

Since the B vitamins are involved in similar bodily functions and sometimes depend on the presence of other B vitamins, it may be beneficial for the body to get the vitamins through a complex supplement instead of individually. However, there may be times when a doctor or other health care professional suggests taking one B vitamin for a specific reason.

What are some dietary sources of Vitamin B-1 100 mg?

Vitamin B1, also known as Thiamin, is found in a wide variety of foods. The best sources of thiamin are pork and whole grains or enriched grain products. But thiamin can also be found in organ meats, red meats, yeast, nuts, sunflower seeds, peas, milk, cauliflower, spinach and legumes.

What are the food sources of Thiamin?

The food sources for Thiamin are organ meats, red meats, whole grains, nuts, cooked dried beans, peas, milk, cauliflower, and spinach.

What does Thiamin do?

Thiamin plays a role in converting food into cellular energy and helps support normal nervous system function.†

What is the Daily Value for Thiamin?

The Daily Value for Thiamin is 1.5 mg, the safe upper limit is 50-150 mg depending on age, sex, and gender.


For 40 years, we have been obsessed with quality at Nature Made®. From ingredient sourcing, to industry-leading manufacturing practices, to our third-party verification approach, we believe it is our responsibility to lead in delivering quality products and a quality consumer experience. For more information, click here.
  • At Nature Made, we’re committed to quality. That’s why we work with USP, an independent organization that tests for quality and purity. The Nature Made difference is easy to see — just look for the USP Verified Mark on the label of our products.

  • Nature Made® is the #1 Pharmacist Recommended Brand in Nine Categories, based on US News & World Report - Pharmacy Times Survey. – Nature Made has been recognized in the Letter Vitamins, Omega-3/Fish Oil, Coenzyme Q10, Flax Seed Oil, Herbal Supplements, Cholesterol Management-Natural, Garlic, Diabetic Multivitamins and Mood Health Supplements categories.