Process for obtaining a dextrin showing: • a weight-average molecular weight ranging from 250 000 to 1 400 000 Da, determined by size-exclusion chromatography of HPSEC-MALLS; • a solubility, measured according to a test A, ranging from 50 to 85%; • with respect to the total weight of said dextrin, comprising: • a mass fraction of between 5 and 25% of starch molecules with a molecular weight of greater than 1 000 000 Da, • a mass fraction of between 25 and 50% of starch molecules with a molecular weight of greater than 100 000 Da and less than or equal to 1 000 000 Da, • a mass fraction of between 30 and 50% of starch molecules with a molecular weight of greater than 10 000 Da and less than or equal to 100 000 Da, • a mass fraction of less than 20% of starch molecules with a molecular weight of less than or equal to 10 000 Da. said process being characterized in that it comprises - a step of introducing at least one granular starch into a turboreactor as described in detail in the document EP 710 670; - a step of introducing, into said turboreactor, at least one acidic agent chosen from strong acids; - a step of modifying the starch in said turboreactor; - a step of recovering the starch modified during the preceding step; in which at least part of the modifying reaction step is carried out with: • a moisture content of the starch of between 1 and 3%; • an amount of acid introduced of between 0.003 and 0.020 mol of acid per kg of dry starch; • and a temperature of the turboreactor of between 160 and 215°C, preferably between 170 and 210°C. and in that the modifying step has a duration of between 1 and 10 minutes, preferably between 3 and 7 minutes. • a weight-average molecular weight ranging from 250 000 to 1 400 000 Da, determined by size-exclusion chromatography of HPSEC-MALLS; • a solubility, measured according to a test A, ranging from 50 to 85%; • with respect to the total weight of said dextrin, comprising: • a mass fraction of between 5 and 25% of starch molecules with a molecular weight of greater than 1 000 000 Da, • a mass fraction of between 25 and 50% of starch molecules with a molecular weight of greater than 100 000 Da and less than or equal to 1 000 000 Da, • a mass fraction of between 30 and 50% of starch molecules with a molecular weight of greater than 10 000 Da and less than or equal to 100 000 Da, • a mass fraction of less than 20% of starch molecules with a molecular weight of less than or equal to 10 000 Da. • a mass fraction of between 5 and 25% of starch molecules with a molecular weight of greater than 1 000 000 Da, • a mass fraction of between 25 and 50% of starch molecules with a molecular weight of greater than 100 000 Da and less than or equal to 1 000 000 Da, • a mass fraction of between 30 and 50% of starch molecules with a molecular weight of greater than 10 000 Da and less than or equal to 100 000 Da, • a mass fraction of less than 20% of starch molecules with a molecular weight of less than or equal to 10 000 Da. - a step of introducing at least one granular starch into a turboreactor as described in detail in the document EP 710 670; - a step of introducing, into said turboreactor, at least one acidic agent chosen from strong acids; - a step of modifying the starch in said turboreactor; - a step of recovering the starch modified during the preceding step; • a moisture content of the starch of between 1 and 3%; • an amount of acid introduced of between 0.003 and 0.020 mol of acid per kg of dry starch; • and a temperature of the turboreactor of between 160 and 215°C, preferably between 170 and 210°C.