The study examines the impact of silymarin supplementation during the early post-transplant period, administering 900 g daily for 30 days under standard treatment. Subsequently, the investigators investigate its impact on graft function, as measured by eGFR (CKD-EPI equation), UACR or UPCR, the development of dnDSA, rejection changes, and histological changes in the 3-month biopsy protocol. At the same time, investigators will investigate the effect of silymarin on metabolic complications-PTDM, DLP, disorders of calcium-phosphate metabolism, and arterial hypertension in the post-transplant period-in comparison with the placebo group. At the same time, investigators will investigate the safety and tolerance of silymarin.