Thiamin – Consumer

A woman discussing supplements with a pharmacist.

This is a reader-pleasant overview of Thiamin. For a lot more details, see our overall health professional truth sheet on Thiamin.

What is thiamin and what does it do?

Thiamin (also termed vitamin B1) allows convert the food stuff you try to eat into the energy you require. Thiamin is essential for the expansion, improvement, and operate of the cells in your entire body.

How significantly thiamin do I require?

The amount of money of thiamin you require depends on your age and sex. Regular day-to-day suggested quantities are mentioned down below in milligrams (mg).

Life Phase Encouraged Amount
Delivery to 6 months .2 mg
Infants 7–12 months .3 mg
Children 1–3 yrs .5 mg
Children 4–8 yrs .6 mg
Children 9–13 yrs .9 mg
Teenager boys 14–18 yrs 1.2 mg
Teenager women 14–18 yrs 1. mg
Guys 1.2 mg
Girls 1.1 mg
Expecting teens and women of all ages 1.four mg
Breastfeeding teens and women of all ages 1.four mg

What foodstuff give thiamin?

Thiamin is uncovered by natural means in lots of foodstuff and is added to some fortified foodstuff. You can get suggested quantities of thiamin by having a selection of foodstuff, which includes the adhering to:

  • Total grains and fortified bread, cereal, pasta, and rice
  • Meat (especially pork) and fish
  • Legumes (such as black beans and soybeans), seeds, and nuts

What sorts of thiamin nutritional supplements are available?

Thiamin is uncovered in multivitamin/multimineral supplements, in B-complex nutritional supplements, and in supplements containing only thiamin. Typical types of thiamin in nutritional supplements are thiamin mononitrate and thiamin hydrochloride. Some supplements use a artificial sort of thiamin termed benfotiamine.

Am I acquiring adequate thiamin?

Most people in the United States get adequate thiamin from the foodstuff they try to eat. Thiamin deficiency is exceptional in this place. Nevertheless, particular teams of people are a lot more likely than other people to have problems acquiring adequate thiamin:

Chat with your healthcare company(s) about thiamin and other nutritional supplements to support you ascertain which, if any, may be beneficial for you.

What occurs if I will not get adequate thiamin?

You can develop thiamin deficiency if you do not get adequate thiamin in the foodstuff you try to eat or if your entire body eliminates too significantly or absorbs too tiny thiamin.

Thiamin deficiency can trigger reduction of body weight and appetite, confusion, memory reduction, muscle weak spot, and coronary heart problems. Significant thiamin deficiency prospects to a sickness termed beriberi with the added indicators of tingling and numbness in the toes and hands, reduction of muscle, and inadequate reflexes. Beriberi is not prevalent in the United States and other made nations.

A a lot more prevalent illustration of thiamin deficiency in the United States is Wernicke-Korsakoff syndrome, which typically impacts people with alcoholism. It brings about tingling and numbness in the hands and toes, serious memory reduction, disorientation, and confusion.

What are some outcomes of thiamin on overall health?

Researchers are finding out thiamin to greater comprehend how it impacts overall health. Here are some illustrations of what this investigation has shown.

Diabetic issues

Persons with diabetes normally have low degrees of thiamin in their blood. Researchers are finding out whether thiamin supplements can increase blood sugar degrees and glucose tolerance in people with style 2 diabetes. They are also finding out whether benfotiamine (a artificial sort of thiamin) supplements can support with nerve injury brought on by diabetes.

Heart failure

Numerous people with coronary heart failure have low degrees of thiamin. Researchers are finding out whether thiamin supplements may support people with coronary heart failure.

Alzheimer’s sickness

Researchers are finding out the chance that thiamin deficiency could influence the dementia of Alzheimer’s sickness. No matter whether thiamin supplements could support mental operate in people with Alzheimer’s sickness wants additional research.

Can thiamin be harmful?

Thiamin has not been shown to trigger any damage.

Does thiamin interact with medications or other nutritional supplements?

Indeed. Some medications can decreased thiamin degrees in the entire body. Here are a pair illustrations:

  • Furosemide (Lasix®), which is utilized to deal with substantial blood pressure and inflammation brought on by excessive fluid in the entire body
  • Fluorouracil (5-fluorouracil and Adrucil®), which is utilized in chemotherapy solutions for some styles of cancer

Notify your doctor, pharmacist, and other healthcare suppliers about any nutritional supplements and prescription or more than-the-counter medications you take. They can inform you if the nutritional supplements may interact with your medications or if the medications may interfere with how your entire body absorbs, works by using, or breaks down vitamins and minerals such as thiamin.

Thiamin and healthful having

Persons should really get most of their vitamins and minerals from food stuff and beverages, according to the federal government’s Nutritional Rules for Us residents. Meals comprise natural vitamins, minerals, nutritional fiber, and other factors that gain overall health. In some circumstances, fortified foodstuff and nutritional supplements are beneficial when it is not possible to meet up with wants for 1 or a lot more vitamins and minerals (e.g., in the course of precise daily life phases such as being pregnant). For a lot more data about creating a healthier nutritional pattern, see the Nutritional Rules for Us residentsexternal link disclaimer and the U.S. Office of Agriculture’s MyPlate.external link disclaimer

Where can I come across out a lot more about thiamin?

  • For typical data on thiamin:
  • For a lot more data on food stuff resources of thiamin:
  • For a lot more guidance on deciding upon nutritional supplements:
  • For data about creating a healthier nutritional pattern:


This truth sheet by the Place of work of Nutritional Health supplements (ODS) presents data that should really not take the spot of medical guidance. We persuade you to talk to your healthcare suppliers (doctor, registered dietitian, pharmacist, etcetera.) about your desire in, queries about, or use of nutritional supplements and what could be very best for your total overall health. Any point out in this publication of a precise products or service, or recommendation from an business or professional modern society, does not stand for an endorsement by ODS of that products, service, or professional guidance.

Current: March 22, 2021 Background of variations to this truth sheet