Multi-Vi-Min was formulated to have low allergen potential, and many people who cannot tolerate a complex nutrient formula do well with the Multi-Vi-Min formulas. The nutrients used in the formulas are derived from the purest USP grade materials, which are ultimately synthesized from USP-grade mineral oil. Vitamins B2 and B6 are supplied partially in their coenzyme (“activated”) forms, and vitamin B12 and folate are in their bioavailable “methyl” forms. Vitamin C is purposely left out of Multi-Vi-Min Classic Hypoallergenic Formula because vitamin C may increase iron absorption.* Since 1979, Allergy Research Group has used only the purest, and whenever possible, lowest allergy potential natural ingredients available. Many very sensitive individuals who react to supplements in general can tolerate Allergy Research Group products. Strict quality control procedures are followed in every stage of production, including inspection, manufacturing, packaging, and storing. Allergy Research Group fully discloses all active and inactive ingredients on every product label, allowing you to make informed choices for your nutritional support. Physicians and healthcare practitioners around the world depend on Allergy Research Group for their patients' nutritional support. This brand originated with the ground-breaking oxidant/antioxidant work of Stephen Levine, Ph.D., as one of the first to introduce truly hypoallergenic nutritional supplements in the United States.