The present invention relates to nano-sized self-assembled structured concentrates and their use as effective suitable carriers for transferring active components into the human body. The nano-sized self-assembled concentrates are composed of an aqueous phase, an oil phase, a surfactant a co-solvent and co-surfactant. The formed nano-sized self-assembled structured concentrates may be in the form of an aqueous continuous phase, an oil continuous phase or a bicontinuous phase, and may thus be diluted to any desired extent in either oil or water maintaining their structure and the active material comprised within the nano-sized self-assembled structured concentrates.