Importance of Diet
For good health, it is important that you eat a balanced and varied diet. Follow carefully any diet program your health care professional may recommend. For your specific dietary vitamin and/or mineral needs, ask your health care professional for a list of appropriate foods. If you think that you are not getting enough vitamins and/or minerals in your diet, you may choose to take a dietary supplement.
Thiamine is found in various foods, including cereals (whole-grain and enriched), peas, beans, nuts, and meats (especially pork and beef). Some thiamine in foods is lost with cooking.
Vitamins alone will not take the place of a good diet and will not provide energy. Your body also needs other substances found in food such as protein, minerals, carbohydrates, and fat. Vitamins themselves often cannot work without the presence of other foods.
The daily amount of thiamine needed is defined in several different ways.
- For U.S.—
- Recommended Dietary Allowances (RDAs) are the amount of vitamins and minerals needed to provide for adequate nutrition in most healthy persons. RDAs for a given nutrient may vary depending on a person's age, sex, and physical condition (e.g., pregnancy).
- Daily Values (DVs) are used on food and dietary supplement labels to indicate the percent of the recommended daily amount of each nutrient that a serving provides. DV replaces the previous designation of United States Recommended Daily Allowances (USRDAs).
- For Canada—
- Recommended Nutrient Intakes (RNIs) are used to determine the amounts of vitamins, minerals, and protein needed to provide adequate nutrition and lessen the risk of chronic disease.
Normal daily recommended intakes in milligrams (mg) for thiamine are generally defined as follows:
|Persons||U.S. (mg)||Canada (mg)|
|Infants and children |
Birth to 3 years of age
|4 to 6 years of age||0.9||0.7|
|7 to 10 years of age||1||0.8–1|
|Adolescent and adult males||1.2–1.5||0.8–1.3|
|Adolescent and adult females||1–1.1||0.8–0.9|
Thiamine Pregnancy Warnings
Thiamine has been assigned to pregnancy category A (injectable) and category C (at doses above RDA) by the FDA. Animal studies have failed to reveal evidence of fetal harm. Thiamine is only recommended for use during pregnancy when benefit outweighs risk.
The recommended daily allowance (RDA) for thiamine during pregnancy is 1.4 mg/day regardless of a woman's age. Women carrying more than one fetus may have increased needs for thiamine.
Thiamine Breastfeeding Warnings
There are no data on the excretion of thiamine into human milk. The manufacturer recommends that caution be used when administering thiamine to nursing women.
The recommended daily allowance (RDA) for thiamine during lactation is 1.4 mg/day regardless of a woman's age. Women who are breast-feeding more than one infant may have increased needs for thiamine.