Vitamin B1, also called thiamine or thiamin, is one of 8 B vitamins. All B vitamins help the body convert food (carbohydrates) into fuel (glucose), which is used to produce energy. These B vitamins, often referred to as B complex vitamins, also help the body metabolize fats and protein. B complex vitamins are needed for healthy skin, hair, eyes, and liver. They also help the nervous system function properly, and are needed for good brain function.
Functions of Vitamin B1
Green peas, black beans, split peas, lentils, navy beans, lima beans, pinto beans, soybeans, kidney beans, chickpeas, pistachios, pecans and sesame seeds. Raw sunflower seeds provide more thiamine than other nuts and seeds.
Romaine lettuce, asparagus, crimini mushrooms, boiled spinach, celery, tomato, eggplant, mustard greens, Brussels sprouts, cabbage, bell peppers, watermelon, carrots, squash, turnip greens, broccoli, green beans, yellow corn, kale, pineapple, oranges, cauliflower, Swiss chard, collard greens, garlic and grapes are good sources.
Nutritional yeast and blackstrap molasses contain large amounts of vitamin B1.
Who are Prone to deficiency
• People with Crohn's disease
• People undergoing kidney dialysis
Symptoms of thiamine deficiency are fatigue, irritability, depression and abdominal discomfort.
Thiamine is a water-soluble vitamin and as such, it is least likely to reach toxic levels. However, there is an exception. When thiamine is taken intravenously (injections), it has been reported to cause anaphylactic shock in few people. Symptoms of a thiamine overdose may include a feeling of warmth, weakness, sweating, nausea, restlessness, difficulty breathing, tightness of the throat, bluish coloured skin, and death.