Abstract: The invention concerns a lipid composition that is self-emulsifying in the presence of a hydrophilic phase, comprising between 0.001% and 20% by weight, relative to the total weight of the composition, of at least one active substance; between 5% and 60% by weight, relative to the total weight of the composition, of an oily phase; a first surfactant; a second surfactant; the ratio between the first surfactant and the second surfactant being between 0.5 and 6; said lipid composition is such that, after dispersion in the hydrophilic phase, it forms particles having, as an absolute value, a charge of between 10 mV and 100 mV. The invention also concerns a method for preparing a self-emulsifying lipid composition, and the use of said self-emulsifying lipid composition in the pharmacutical or nutraceutical veterinary field.