The present invention relates to a water-in-oil emulsion, comprising a continuous hydrophobic phase in which the hydrophilic phase is dispersed, wherein: (i) the emulsion has a total water content in the range of 30% to 95% (w/w)； (ii) the emulsion does not comprise an emulsion stabilizer； (iii) the hydrophobic phase has a ratio of low hydrophilic-lipophilic balance amphiphilic molecules to oils in the range of 50% to 96% (w/w)； and (iv) the continuous hydrophobic phase is made of lyotropic liquid crystalline nanostructures including 5% to 40% (w/w) water and does not comprise a lamellar phase wherein the low hydrophilic- lipophilic balance amphiphilic molecules have an HLB value in the range between 4 and 11. Furthermore, the present invention relates to a corresponding method for preparing such water-in-oil emulsion, the method comprising: (a) pre-mixing of the two fluid hydrophilic and hydrophobic phases at a rotation speed of at least 4.000 rpm and at a temperature of at least 40°C, thus forming a raw emulsion； (b) positioning the raw emulsion in a shear device； and (c) applying a shear rate of at least 4.500 s-1； and cooling the final emulsion obtained to ambient temperature, thus forming a continuous hydrophobic phase of the emulsion that is made of lyotropic liquid crystalline nanostructures.Cette invention concerne une émulsion eau dans l'huile comprenant une phase hydrophobe continue contenant une phase hydrophile à l'état dispersé, l'invention étant caractérisée en ce que : (i) l'émulsion a une teneur d'eau totale dans la plage de 30 à 95 % (p/p)； (ii) l'émulsion ne contient pas de stabilisant； (iii) la phase hydrophobe a un rapport des molécules amphiphiles à bas indice HLB (équilibre hydrophile-lipophile) aux huiles dans la plage de 50 à 96 % (p/p)； et (iv) la phase hydrophobe continue est constituée de nanostructures cristallines liquides lyotropes contenant de 5 à 40 % (p/p) d'eau et est dépourvue de phase lamellaire, les molécules amphiphiles à bas HL
