Thiamin – Consumer

This is a reader-pleasant overview of Thiamin. For extra information, see our well being experienced

A woman discussing supplements with a pharmacist.

This is a reader-pleasant overview of Thiamin. For extra information, see our well being experienced reality sheet on Thiamin.

What is thiamin and what does it do?

Thiamin (also identified as vitamin B1) can help transform the food you take in into the energy you will need. Thiamin is important for the progress, development, and purpose of the cells in your overall body.

How considerably thiamin do I will need?

The total of thiamin you will need is dependent on your age and sexual intercourse. Average day by day suggested quantities are shown beneath in milligrams (mg).

Everyday living Stage Advised Amount
Start to 6 months .two mg
Infants 7–12 months .3 mg
Children 1–3 years .5 mg
Children 4–8 years .6 mg
Children 9–13 years .9 mg
Teenager boys 14–18 years one.two mg
Teenager ladies 14–18 years one. mg
Adult men one.two mg
Women of all ages mg
Pregnant teenagers and women of all ages one.four mg
Breastfeeding teenagers and women of all ages one.four mg

What foodstuff supply thiamin?

Thiamin is found obviously in lots of foodstuff and is extra to some fortified foodstuff. You can get suggested quantities of thiamin by having a variety of foodstuff, like the next:

  • Entire grains and fortified bread, cereal, pasta, and rice
  • Meat (primarily pork) and fish
  • Legumes (these types of as black beans and soybeans), seeds, and nuts

What kinds of thiamin nutritional supplements are offered?

Thiamin is found in multivitamin/multimineral supplements, in B-complex nutritional supplements, and in supplements that contains only thiamin. Popular kinds of thiamin in nutritional supplements are thiamin mononitrate and thiamin hydrochloride. Some supplements use a artificial type of thiamin identified as benfotiamine.

Am I acquiring adequate thiamin?

Most persons in the United States get adequate thiamin from the foodstuff they take in. Thiamin deficiency is exceptional in this country. However, specified teams of persons are extra most likely than many others to have difficulty acquiring adequate thiamin:

Chat with your health care provider(s) about thiamin and other nutritional supplements to assist you ascertain which, if any, may possibly be important for you.

What comes about if I do not get adequate thiamin?

You can develop thiamin deficiency if you don’t get adequate thiamin in the foodstuff you take in or if your overall body removes way too considerably or absorbs way too minimal thiamin.

Thiamin deficiency can cause decline of fat and hunger, confusion, memory decline, muscle weak point, and coronary heart challenges. Severe thiamin deficiency prospects to a sickness identified as beriberi with the extra indicators of tingling and numbness in the toes and fingers, decline of muscle, and bad reflexes. Beriberi is not popular in the United States and other created international locations.

A extra popular example of thiamin deficiency in the United States is Wernicke-Korsakoff syndrome, which generally influences persons with alcoholism. It triggers tingling and numbness in the fingers and toes, serious memory decline, disorientation, and confusion.

What are some results of thiamin on well being?

Experts are finding out thiamin to greater have an understanding of how it influences well being. Here are some examples of what this investigate has proven.


Individuals with diabetic issues generally have small stages of thiamin in their blood. Experts are finding out no matter if thiamin supplements can boost blood sugar stages and glucose tolerance in persons with style two diabetic issues. They are also finding out no matter if benfotiamine (a artificial type of thiamin) supplements can assist with nerve hurt triggered by diabetic issues.

Coronary heart failure

Numerous persons with coronary heart failure have small stages of thiamin. Experts are finding out no matter if thiamin supplements may possibly assist persons with coronary heart failure.

Alzheimer’s sickness

Experts are finding out the probability that thiamin deficiency could impact the dementia of Alzheimer’s sickness. Regardless of whether thiamin supplements might assist psychological purpose in persons with Alzheimer’s sickness requires more study.

Can thiamin be unsafe?

Thiamin has not been proven to cause any damage.

Does thiamin interact with medications or other nutritional supplements?

Indeed. Some medications can lower thiamin stages in the overall body. Here are a pair examples:

  • Furosemide (Lasix®), which is utilized to handle high blood force and swelling triggered by excessive fluid in the overall body
  • Fluorouracil (5-fluorouracil and Adrucil®), which is utilized in chemotherapy remedies for some sorts of most cancers

Inform your health care provider, pharmacist, and other health care suppliers about any nutritional supplements and prescription or more than-the-counter medications you take. They can notify you if the nutritional supplements may possibly interact with your medications or if the medications may possibly interfere with how your overall body absorbs, works by using, or breaks down vitamins these types of as thiamin.

Thiamin and healthful having

Individuals must get most of their vitamins from food and drinks, in accordance to the federal government’s Nutritional Guidelines for Americans. Foods incorporate vitamins, minerals, nutritional fiber, and other components that gain well being. In some scenarios, fortified foodstuff and nutritional supplements are valuable when it is not achievable to satisfy requires for a person or extra vitamins (e.g., in the course of unique lifestyle phases these types of as pregnancy). For extra facts about making a wholesome nutritional pattern, see the Nutritional Guidelines for Americansexternal link disclaimer and the U.S. Section of Agriculture’s MyPlate.external link disclaimer

In which can I uncover out extra about thiamin?

  • For typical facts on thiamin:
  • For extra facts on food sources of thiamin:
  • For extra information on picking nutritional supplements:
  • For facts about making a wholesome nutritional pattern:


This reality sheet by the Place of work of Nutritional Nutritional supplements (ODS) provides facts that must not take the spot of health care information. We encourage you to speak to your health care suppliers (health care provider, registered dietitian, pharmacist, etc.) about your interest in, concerns about, or use of nutritional supplements and what might be very best for your general well being. Any point out in this publication of a unique solution or support, or recommendation from an firm or experienced society, does not represent an endorsement by ODS of that solution, support, or pro information.

Up to date: March 22, 2021 Background of adjustments to this reality sheet