Background: The bioactive components of plant foods and medicinal plants have attracted interest due to their potential impact on the progression of chronic kidney disease (CKD) and outcomes.
Objective: This study aimed to conduct a critical and quantitative systematic review of randomized clinical trials (RCTs) investigating the potential effects of selected phytochemicals from plant-based foods and medicinal plants in CKD and dialysis patients.
Methods: The review included studies that related plant-based bioactive compounds (curcumin, propolis, sulforaphane, betalain, catechins, rhein, emodin, aloe-emodin, flavonoids, and triptolide) and medicinal plants (green tea, rhubarb, , and Hook F) in CKD and dialysis patients. A literature search was conducted in PubMed, LILACS, Embase, Scopus, and WOS between December 2022 and October 2024. This review was performed according to the PRISMA flowchart and was registered in PROSPERO (595162).
Results: In the eight RCTs conducted with curcumin, anti-inflammatory, antioxidant, and microbiota-modulating properties were reported. As for propolis, in three RCTs, anti-inflammatory, anti-proteinuric, and renal-protective properties were reported. Sulforaphane in one RCT showed antioxidant and cardiovascular benefits, and in another RCT no effects were observed. In one RCT, genistein was shown to be a potential anti-inflammatory agent and improved nutritional status. Allicin in two RCTs showed cardioprotective, antioxidant, anti-inflammatory, and lipid-lowering effects. Finally, beetroot showed a vasodilator effect in one RCT. As for the medicinal plants, green tea, rhubarb, , and Hook F, in six RCTs they showed antioxidant, anti-inflammatory, cardioprotective, antiproteinuric, and renoprotective properties.
Conclusions: These results suggest that bioactive compounds of plant-based foods and medicinal plants have promising effects in terms of preventing or treating CKD progression and appear to improve inflammation and antioxidant capacity and support cardiovascular benefits and renoprotective effects; however, it is recommended that further studies be carried out.
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