Proprietary blend - is a complex of bioactive ingredients in the proportions, which are covered by the manufacturer's patent. According to the law in force in Poland, the components of the blend are known, and , by the place on the packaging, you can identify which components are in bigger amount (the components are listed in the decreasing order of amounts).
Proprietary blends are used in many food supplements, such as creatine stacks, no-boosters, fat burners and pro-testosterone supplements, improving libido.