An apparatus for slicing food products, in particular a high-performance slicer, comprising a single-track or multi-track product feed which feeds either one product in one track or simultaneously feeds a plurality of products disposed next to one another in parallel tracks in a feed direction to a cutting plane in which a cutting blade moves, in particular in a rotating and/or revolving manner, wherein the product feed comprises a product support (19, 21) and a product guide arranged above it, wherein the product guide comprises at least one upper guide unit having an engagement surface which faces the product support (19, 21), which extends in the feed direction and which is configured, when a product disposed on the product support (19, 21) is being fed, to enter into engagement with the upper side of said product, wherein, in addition to the upper guide unit, the product guide comprises at least one adjustable abutment unit - which is fastened to the upper guide unit, - which, in an abutment position, fulfills an abutment function for a front end of a product moved against the abutment unit in that the abutment unit blocks the feed path to the cutting plane for the product and thus blocks the product and prevents a further movement of the product to the cutting plane, and - which, in a release position different from the abutment position, clears the feed path to the cutting plane for the product, characterized in that the abutment unit is adjustable relative to the upper guide unit between the abutment position and the release position. wherein the product feed comprises a product support (19, 21) and a product guide arranged above it, wherein the product guide comprises at least one upper guide unit having an engagement surface which faces the product support (19, 21), which extends in the feed direction and which is configured, when a product disposed on the product support (19, 21) is being fed, to enter into engagement with the upper side of said product, wherein, in addition to the upper guide unit, the product guide comprises at least one adjustable abutment unit - which is fastened to the upper guide unit, - which, in an abutment position, fulfills an abutment function for a front end of a product moved against the abutment unit in that the abutment unit blocks the feed path to the cutting plane for the product and thus blocks the product and prevents a further movement of the product to the cutting plane, and - which, in a release position different from the abutment position, clears the feed path to the cutting plane for the product, - which is fastened to the upper guide unit, - which, in an abutment position, fulfills an abutment function for a front end of a product moved against the abutment unit in that the abutment unit blocks the feed path to the cutting plane for the product and thus blocks the product and prevents a further movement of the product to the cutting plane, and - which, in a release position different from the abutment position, clears the feed path to the cutting plane for the product, characterized in that the abutment unit is adjustable relative to the upper guide unit between the abutment position and the release position.