Vitamin B-1 (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. Our Vitamin B-1 is carefully tested and produced to superior quality standards. Gluten-Free No sugar, salt, yeast, wheat, corn, soy, dairy products, artificial colors, flavors or preservatives.