It is indispensable to the health of the nervous system, and as a factor of normal growth, regularity of metabolism and maintenance of appetite. It is anti-Iberian and anti-neuritic.
The absorption occurs mainly in the small intestine, but also in the large intestine, and once absorbed, it is directed to the various tissues and organs, especially to the liver and heart which are the organs richest in thiamine, but also to the kidney, brain, adrenal glands, spleen, lungs and muscles that contain, despite their relatively low concentration, half of all thiamine in the body. Its deficiency produces several symptoms associated with beriberi. It is thermolabile (destroys at elevated temperature) and water soluble (water soluble).
The daily need in thiamine is 1.8 to 2.3 milagrams for the adult.
Food rich Vitamin B¹ (thiamine): Pumpkin moraine, garlic, raw peanuts, rice, oats, horse-chestnut, rye, barley, milk, beer yeast, chicken egg, fresh soybeans, tamarind, wheat.