Doctor?s Best Fully Active B Complex contains all eight important B Vitamins a full spectrum designed for optimal absorption and utilization to support overall health and well-being. Water-soluble B vitamins play important roles in cell metabolism supporting DNA organs genes cells tissues skin health immune system enzyme functions and energy production.* Quatrefolic? is the glucosamine salt of (6S)-5-methyltetrahydrofolate the most bioavailable form of folate that provides greater stability and water solubility.* Folate is an essential vitamin to support DNA proper cell division heart health mental and emotional well-being. At Doctor?s Best we lead with science. Our products are backed by research and crafted using pure ingredients carefully sourced from around the globe. Since 1990 we have dedicated ourselves to providing highly effective nutritional supplements that enable you to live a healthier lifestyle. We want nothing more than to see you and your family thrive!