A puncturing system includes a support tape (1) that supports a plurality of lancets (2), a first reel (3) onto which the support tape (1) with unused lancets (2) is wound, a second reel (4) on which portions of the support tape with used lancets (2) are to be wound, a winding mechanism which, by turning the second reel (4), brings the lancets (2) supported by the support tape (1) to a position of use one after another and thus unwinds the support tape (1) from the first reel (3) and winds it onto the second reel (4), and a puncturing drive mechanism (7) with which lancets (2) located in the position of use are accelerated in order to puncture the skin. The support tape (1) between the first and second reels (3, 4) is twisted only in one direction of rotation by at least a quarter turn, preferably by at least a half turn.