Thiamin (also known as thiamine or vitamin B1) is an essential nutrient required by the body for maintaining cellular function and metabolism. Consequently, it's crucial for the function of a wide array of organs, including the brain. (1)

While rare, a deficiency of thiamin leads to widespread degeneration of the body, particularly the nervous and circulatory systems. (2,3)

A deficiency of thiamin is known as beriberi. One specific type affects primarily the central nervous system, and is known as Wernicke-Korsakoff syndrome. Besides the nervous system, beriberi can also have a severe impact on the cardiovascular system, along with other body systems. (2) Worldwide, beriberi is most common in places where non-enriched white rice or other refined grains make up a large part of the diet. (3)

Over-consumption of thiamin is unknown and at least one study shows that amounts taken well in excess of the daily value (DV) may actually enhance brain functioning. (4) In fact, it appears that thiamin supplements may help to prevent Alzheimer's disease, although more research is needed in this area. (5,6)

Foods high in thiamin include pork, fish, seeds, nuts, beans, green peas, tofu, brown rice, squash, asparagus, and seafood. The current daily value (DV) for vitamin B1 is 1.2mg. (7)

Below is a list of high thiamin foods ranked by a common serving size. Use the nutrient ranking of all foods high in thiamin to sort by nutrient density (100-gram serving size).

Looking for more foods high in B Vitamins? Click here for other vitamin B foods.