A drink includes an edible liquid or semisolid preparation and transfer factor. The drink may also include lactoferrin and one or more preservatives. An edible preparation includes a fruit component and transfer factor. The fruit component may include at least one oligoproanthocyanidin-containing fruit. The edible preparation may also include lactoferrin. One or more preservatives may also be included in the edible preparation. The drink or the edible preparation may be sterilized or pasteurized.