Known as anti beri -beri, anti- neuritic, anti -aging vitamin, plays an important role in the normal functioning of the nervous system, the regulation of carbohydrates and good digestion. It protects heart muscles, stimulate brain action and helps prevent constipation. It has a mild diuretic effect.
Valuable sources of this vitamin are wheat germ, yeast, the outer layer of whole grains, cereals, pulses, nuts, legumes, dark green leafy vegetables, milk, banana and apple.
The deficiency of thiamine can cause serious impairment of digestive system, chronic constipation, loss of weight, diabetes, mental depression, nervous exhaustion and weakness of the heart.
The recommended daily allowance of this vitamin is about 2 milligrams for adults and 1.2 milligram for children. The need for this vitamin increases during illness and surgery as well as during pregnancy and lactation. When taken in large quantity, say upto 50 mg , it is beneficial in the treatment of digestive disorders, neuritis and other nervous troubles as well as mental depression. For best results, all other vitamins of B group should be administered simultaneously. Prolonged ingestion of large doses of any one of the isolated B complex vitamins may result in high urinary losses of other B- vitamins and lead to deficiency of these vitamins.