Transfer Factor Sensitive™ provides an advanced comprehensive immune support formula, promoting healthy natural killer cell activity. The product has been formulated for the sensitive patient; the active ingredient is Transfer Factor PurePlex™ — a combination of pure transfer factor and colostrum fractions. The capsule size is smaller, and for younger patients who open the capsule, the taste is almost neutral. As with all of our transfer factor products, Transfer Factor Sensitive™ is gluten-free, and formulated with a proprietary blend of colostrum which is low in casein. Product may be used as a daily-use supplement to promote and maintain healthy natural killer cell function as well as providing additional support to the immune system during acute health challenges.