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B-Complex 12 contains an optimal balance of B vitamins, with extra B12 and folate. Unlike many multi-B vitamins, it contains the active forms of the B vitamins for optimal utilization by the body. Unique Formula Unlike many multi-B vitamin supplements, B-Complex 12 contains the active forms of eight water-soluble B vitamins. Well-Researched Benefits Thorne's B-Complex 12 supplies the two active forms of vitamin B12 – adenosylcobalamin and methylcobalamin – as well as the two active forms of folate – folinic acid and 5-MTHF. The other bioactive forms of the B vitamins in each capsule ensures you will get the most bioavailable vitamin B complex available. Free of Additives B-Complex 12 is not derived from yeast like other B vitamin supplements. Greater Absorption The bioactive forms of the B vitamins in each capsule ensures you will get the most bioavailable vitamin B complex available. Unique Formula Well-Researched Benefits Free of Additives Greater Absorption Brain & Nerve Support The potential for adverse impacts on neurological health (the health of the brain and nerves) is increasing and becoming more prevalent due to increased lifespan, environmental toxicity, and poor diet with subsequent nutrient deficiencies. Mitochondrial sufficiency appears to be at the foundation of brain and nerve health. The mitochondria, the cell’s energy-producing powerhouse, are also a significant source of free radical production, even in healthy individuals. The aging process, poor diet, and environmental toxins can stress the body's built-in antioxidant system, making it less capable of quenching free radicals. Several nutrients can mitigate these activities. Thorne supplements help maintain neurological health. When the highest standards have been met, Thorne creates higher ones. Sourcing Exceptional Ingredients We develop better standards for higher quality ingredients. Thorne cares deeply about where our ingredients come from. We partner only with suppliers whose practices emphasize quality, science, and responsibility. Better ingredients means better potency, absorption, and digestibility - and ultimately better health. Manufacturing the Right Way We manufacture our own products to ensure full supply chain transparency. For more than 30 years, we have invested in clean manufacturing practices. We refuse to use ingredients that can inhibit absorption. We perform our final production in the United States. Our Charleston, SC facility is third-party certified. Four Rounds of Testing We run four rounds of testing for each of our products. We have invested in two state-of-the-art in-house laboratories that allow us to conduct four rounds of testing, while most competitors test only one or two times. We test our raw materials, in-process batches, finish products, and product stability for each product. Thinking Sustainably We're thinking sustainably to protect our environment. We believe the environment should never be compromised for the sake of business gain. At Thorne, we believe that doing our part to protect the environment and its most valuable resources goes hand in hand with our product quality standards. Read more