Enjoy Nature's Way Vitamin B1 (1x100CAP). Health & longevity through the healing power of natureĀthat's what it means to Trust the Leaf.Vitamin B1 (Thiamin) is a precursor to the active metabolite thiamin diphosphate, which is essential for the conversion of glucose into energy. Thiamin also helps in the conversion of carbohydrates into energy reserves. Note: description is informational only. Please refer to ingredients on the product before use. Please address any health or dietary questions to your health professional before using this item.