An aqueous, liquid or semi-liquid pharmaceutical or dietary composition, including at least one L-arginine salt on the basis of at least one gram of the salt per dosage unit. Adding the quantity of water necessary to dissolve an arginine salt, maltitol and, optionally, an alcohol or an alcoholate, ensures the removal of the bitterness from the liquid or semi-liquid compositions made from salified arginine. This specific composition allows considerable doses of arginine to be taken directly via oral administration, by drinking, without adding additional water. Also, a food composition containing a dietary composition as defined above.
