NUTRITION

What Does Vitamin B1 Do?

What Does Vitamin B1 Do?. Part of the series: Nutrition & Vitamins. Vitamin B1, also known as thiamine, is used to process carbohydrates, proteins and fats effectively, and it is also involved with overall cell health, maintaining the integrity of the cell walls. Ingest vitamin B1, found in many fruits and vegetables, with healthy advice from a registered and licensed dietitian in this free video on nutrition.