About Careers Internship MedBlogs Contact us
Vitamin B1 (Thiamine)

Vitamin B1 (Thiamine)

Last Updated on Jan 13, 2020
Font : A-A+

What is Vitamin B1?

Vitamin B1 is also known as thiamine and is an essential nutrient needed by the human body for the normal functioning of several organ systems. It was the first B vitamin discovered (out of eight B vitamins) and thus, was named vitamin B1.(1 Trusted Source
Vitamin B1 (Thiamine)

Go to source


All B vitamins help in converting food in the form of carbohydrates into glucose which is the source of energy in the body. This process is vital for a healthy metabolism.

Vitamin B1 (Thiamine)

Why is Vitamin B1 Important?

Vitamin B1 is important as it performs several roles in multiple different key processes in the body. It acts as a coenzyme and catalyzes the conversion of carbohydrates into sugar. It also helps in strengthening the immune system and in the functioning of the nervous system. The recommended daily allowance for vitamin B1 in adults is 1.2mg for males and 1.1 mg in females. Deficiency of thiamine results in a condition called beriberi.(2 Trusted Source
All You Need to Know About Thiamine

Go to source


Functions of Vitamin B1

Thiamine is essential for the normal functioning of:


Vitamin B1 Sources

  • Most people fulfill their needs for thiamine from their regular diet. The major vitamin B1 containing foods include meat products (pork, beef, poultry), legumes, whole grain products (cereals and unpolished rice), nuts, soybean, brown bread, yeast and peas. The technology these days has brought about an entire range of enhanced or thiamine fortified whole grain options like rice, wheat, and pasta.
Vitamin B1 (Thiamine) Rich Foods
  • Artificial sources of thiamine include either vitamin B1 supplements or multivitamins. Thiamine supplements contain only thiamine while multivitamins (like Vitamin B complex) work like a combo pack and provide other vitamins too. Vitamin supplements are available in the form of tablets, lozenges and soft gels. In severe cases of thiamine deficiency, thiamine is administered intravenously or intramuscularly.(4 Trusted Source
    About Thiamine

    Go to source

Vitamin B1 Benefits

Thiamine or vitamin B1 is used to treat symptoms caused by vitamin B1 deficiency. These include:

Health Benefits of Vitamin B1 (Thiamine) - Treats Beriberi

Vitamin B1 Side Effects

Thiamine pills are relatively safe. Very few cases of allergic reactions have been reported. A daily dosage of 1.4mg is considered safe for expectant and new mothers.

Vitamin B1 Interaction with Foods

Certain food habits interfere with the absorption of thiamine and may lead to a deficiency. Drinking excess of caffeinated beverages like coffee and tea are an example of interference. A diet comprising of raw fish and shellfish may lead to vitamin B1 deficiency. Cooked seafood is safe to include in your diet as the heat destroys the chemicals that interfere with thiamine absorption in the body.(5 Trusted Source
Vitamin B1 - An Overview

Go to source

Health Tips

Vit B1 is a relatively safe supplement that can be used by one and all. Thiamine is required by the body to complete several functions and one should not ignore thiamine deficiency symptoms. One should consult a physician before starting supplement pills.(6 Trusted Source
Opinion of the Scientific Committee on Food on the Tolerable Upper Intake Level of Vitamin B1

Go to source


  1. Vitamin B1 (Thiamine) - (https://www.ncbi.nlm.nih.gov/books/NBK482360/)
  2. All You Need to Know About Thiamine - (https://medlineplus.gov/druginfo/natural/965.html)
  3. More Information on Thiamine - (https://medlineplus.gov/ency/article/002401.htm)
  4. About Thiamine - (https://ods.od.nih.gov/factsheets/Thiamin-HealthProfessional/)
  5. Vitamin B1 - An Overview - (https://www.nutri-facts.org/en_US/nutrients/vitamins/b1.html)
  6. Opinion of the Scientific Committee on Food on the Tolerable Upper Intake Level of Vitamin B1 - (https://ec.europa.eu/food/sites/food/files/safety/docs/sci-com_scf_out93_en.pdf)

Latest Publications and Research on Vitamin B1 (Thiamine)

Citations   close

Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Dr. Rachita Narsaria. (2020, January 13). Vitamin B1 (Thiamine) - Importance, Functions, Sources, Benefits, Side Effects. Medindia. Retrieved on Jul 02, 2022 from https://www.medindia.net/patientinfo/vitamin-b1.htm.

  • MLA

    Dr. Rachita Narsaria. "Vitamin B1 (Thiamine) - Importance, Functions, Sources, Benefits, Side Effects". Medindia. Jul 02, 2022. <https://www.medindia.net/patientinfo/vitamin-b1.htm>.

  • Chicago

    Dr. Rachita Narsaria. "Vitamin B1 (Thiamine) - Importance, Functions, Sources, Benefits, Side Effects". Medindia. https://www.medindia.net/patientinfo/vitamin-b1.htm. (accessed Jul 02, 2022).

  • Harvard

    Dr. Rachita Narsaria. 2021. Vitamin B1 (Thiamine) - Importance, Functions, Sources, Benefits, Side Effects. Medindia, viewed Jul 02, 2022, https://www.medindia.net/patientinfo/vitamin-b1.htm.

Request an Appointment with a Doctor (Nutrition Expert)

Ms. Pandi Alagammai Thillainathan
Ms. Pandi Alagammai Thillainathan
BSc, MSc
1 year experience
Online mode, Porur, Chennai
Ms. Himaja H
Ms. Himaja H
BSc, MSc
12 years experience
Health and Nutrify clinic, Serlingampally, Hyderabad
Ms. Dharanya Ramesh
Ms. Dharanya Ramesh
BSc, Pg
1 year experience
Dt.Dharanya s clinic, Arul Nagar, Coimbatore
Dr. Varsha
Dr.  Varsha
39 years experience
View All

Post a Comment

Comments should be on the topic and should not be abusive. The editorial team reserves the right to review and moderate the comments posted on the site.

Recommended Reading
Health Topics A - Z

    Drugs for Vitamin B1 (Thiamine)
    What's New on Medindia
    Top 10 Vitamin B12 Foods for Vegetarians - Slideshow
    Targeted Screening Program Beneficial for Prostate Cancer Screening
    Are Menopause Symptoms Troubling You?: Try these Options
    View all

    Medindia Newsletters Subscribe to our Free Newsletters!
    Terms & Conditions and Privacy Policy.

    Most Popular on Medindia

    Drug Side Effects Calculator Hearing Loss Calculator Blood Pressure Calculator Daily Calorie Requirements Find a Hospital Nutam (400mg) (Piracetam) The Essence of Yoga Blood - Sugar Chart A-Z Drug Brands in India Pregnancy Confirmation Calculator

    Disclaimer - All information and content on this site are for information and educational purposes only. The information should not be used for either diagnosis or treatment or both for any health related problem or disease. Always seek the advice of a qualified physician for medical diagnosis and treatment. Full Disclaimer

    © All Rights Reserved 1997 - 2022

    This site uses cookies to deliver our services. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Use