Thiamine or vitamin B1 is the source of energy for your body. It is used to normalize body growth, improve digestive health and support the heart. It is also useful for the CNS function. Thiamin is one of the most unstable B vitamins. Baking, pasteurization, or boiling of foods fortified with thiamin can reduce its content by up to 50 percent. Nature Made B1 will provide your body with this essential vitamin and help to prevent its deficiency. This supplement normalizes the digestive system function, prevents the accumulation of lactic acid in the muscles. It tones up the body, prevents fatigue and relieves muscle pain. Thiamine is easily absorbed by the body and is non-toxic. Do not exceed the recommended daily dose.