Thiamine, also known as vitamin B1, aneurine or thiamin, is a water-soluble vitamin that serves several functions in the body. The vitamin helps the functioning of the muscular and nervous systems, and helps turn carbohydrates into sources of energy. The body does not store thiamine and without replacing the vitamin, the body may run out in as little as 14 days. Chronic low levels of thiamine -- a condition called beriberi -- may cause serious complications involving the heart, nervous system and muscles. Eating foods with thiamine can help prevent these complications.
Whole Grain, Cereal and Rice
Whole grain products, pastas and cereals contain thiamine. Manufacturers fortify breads and cereals with B vitamins, especially foods such as white flour or white rice, because refining the foods destroys the natural thiamine found in the food. Yeast in bread products also contains thiamine. Rice and breads contain between 0.19 mg and 0.11 mg of thiamine per serving, while wheat germ cereal has 4.47 mg of thiamine per cup, according to the Linus Pauling Institute. The wheat germ cereal contains much more than the average daily requirements 1.2 mg per day for adult males and 1.1 mg daily for adult males, according to MedlinePlus.
Meats and Seafood
Meat and seafood contain vitamin B-1. Lean meats, such as pork and beef, are good sources of thiamine per each 3 oz serving, which is approximately the size of a deck of cards. Seafood, such as tuna fish, contains a good amount of thiamine for each serving.
Vegetables, Fruits and Dairy Products
Foods such as dairy products, vegetables and fruits do not have large amounts of thiamine, but do have some. Eating these foods in large amount may contribute a significant amount of thiamine for the body, according to the University of Maryland Medical Center. Legumes, including peas, lentils and dried beans, provide some thiamine. Dairy foods such as milk and yogurts as well as fruits such as cantaloupe and oranges contain thiamine. Additional foods that contain thiamine include sunflower seeds, mushrooms, spinach, asparagus, corn and lima beans.
Eggs and Nuts
Nuts, such as pecans and Brazil nuts, contain approximately 0.18 to 0.19 mg of thiamine per 1 oz serving, according to the Linus Pauling Institute. Eggs contain small amounts of thiamine.