Abstract: This invention provides methods for: the control of mucosal cell proliferation; the reduction and/or treatment of damage caused by a cell-damaging agent; and for the reduction and/or treatment of a metabolic disorder.The methods comprise administering to an individual in need of control or reduction and/or treatment on effective amount of a lectin.The invention takes advantageous of the protective and repair capabilities of lectins. It is particularly useful in the prevention and treatment of animals undergoing radiotherapy and/or chemotherapy for cancer.