A process for preparing a composition including a bioactive molecule including the steps ofa. Dissolving a bioactive molecule having at least one acid group with a base at pH=>；11 to obtain a solution Ab. Neutralizing the solution A with an acid to obtain the composition including the bioactive molecule having a pH between 6 and 9,wherein PEG is added before the neutralizing step in case either the base and/or the acid is an inorganic compound, and to a composition including a high concentration of natamycin.
