Abstract: A method of making a consumable product containing purified embryonated Trichuris suis ova (TSO) preferably includes steps of: storing the TSO in an acidic solution; adding a food preservative to the acidic solution to produce a preservative-acid-solution; forming a mixing solution by raising the pH of the preservative-acidic-solution to match the pH of a food substance by titrating the preservative-acidic-solution with an acid neutralizer so that the pH changes at a rate of not more than 1 pH unit per 24 hours, preferably to a pH not higher than 5.0; and producing the consumable product by combining the mixing solution and the food substance while maintaining the temperature of the consumable product between 1 degree Centigrade and 47 degrees Centigrade.