A kit configured for the preparation of a dialysis solution comprising - a first component composition, - a second component composition and - optionally, one or more further component compositions; wherein the first component composition, the second component composition and the optionally present further component composition(s) are adapted to yield a dialysis solution when being mixed with one another said solution having a theoretical osmolarity within the range of from 250 to 550 mosm/L and a pH value within the range of from 4.9 to 8.0, said solution comprising a creatine compound and one or more electrolytes, namely sodium or potassium or calcium or magnesium or chloride ions; and wherein the concentration of the creatine compound is not more than 50 mM, wherein said creatine compound is selected from the group consisting of: - creatine - physiologically acceptable creatine salts of creatine - creatine monohydrate - creatine phosphate - the creatine analog cyclocreatine - the creatine precursor guanidoacetic acid; and wherein the first component composition and/or the second component composition and/or the optionally present further component compositions contain the creatine compound; one of the first, second and optionally further component compositions is a liquid, preferably based on pure water or an aqueous solution; wherein the first component composition is a sterilized solution containing a non-ionic tonicity agent wherein the non-ionic tonicity agents are selected from the group glucose, glucose polymers and glycerin, and an acid, wherein the acid is selected from the group consisting of lactate, pyruvate, citrate, isocitrate, cis-aconitase, [alpha]-ketoglutarate, succinate, fumarate, malate, oxaloacetate, and the solution having a pH value below 6.0; wherein the second component composition is a sterilized solution containing a buffer, namely bicarbonate, lactate or pyruvate; and having a pH value above 7.0; wherein the first component composition and/or the second component composition and/or the optionally present further component composition(s) contain one or more electrolytes, namely sodium or potassium or calcium or magnesium or chloride ions, and wherein the first component composition and/or the second component composition and/or the optionally present further component composition(s) contain the creatine compound; and the kit being a multi-chamber bag system containing the first component composition, the second component composition and the optionally present further component composition(s) in chambers separated from one another by breakable connecting arrangement(s), where the first component composition, the second component composition and the optionally present further component composition(s) can be mixed, following the breaking of the breakable connecting arrangement(s), thereby yielding the dialysis solution. - a first component composition, - a second component composition and - optionally, one or more further component compositions; - creatine - physiologically acceptable creatine salts of creatine - creatine monohydrate - creatine phosphate - the creatine analog cyclocreatine - the creatine precursor guanidoacetic acid; and