Abstract
Background
The lipid-lowering properties and antioxidants of the raisins may reduce the risk factors of cardiovascular diseases. This study aimed to investigate the effect of black seeded raisin consumption on blood pressure (BP), lipid profile, high-sensitivity C-reactive protein (hs-CRP), malondialdehyde (MDA), and serum total antioxidant capacity (TAC) in hyperlipidemic patients.
Methods
Thirty-eight hyperlipidemic patients aged 41.05 ± 10.4 years were recruited to this two-armed, randomized, controlled intervention trial. Participants were instructed to consume 90 g per day black seed raisin in the intervention group, and control group received no intervention. BP, lipid profile, and plasma levels of TAC, MDA, hs-CRP, and FBS were determined at baseline and week 5.
Results
After 5 weeks, the diastolic BP reduced significantly in raisin group compared with baseline (81.80 ± 10.22 vs 77.05 ± 11.03, P = 0.001) and TAC was significantly increased in raisin group compared with the control group (394 ± 116.93 vs 479 ± 122.31, P = 0.001). The serum level of MDA in the raisin group was significantly lower compared with the control group (1.35 ± 0.88 vs 1.39 ± 0.67, P = 0.039). No significant changes were found in lipid profile, SBP, hs-CRP, and FBS.
Conclusion
These results suggest that consumption of black raisin which is rich in polyphenolic compounds has beneficial effects on some cardiovascular risk factors especially blood pressure and serum antioxidant capacity in patients with hyperlipidemia.
Trial registration
Trial registration number: IRCT2015091624049N1. This study was registered in the Iranian Registry of Clinical Trials (IRCT). URL of trial registry record: https://www.irct.ir/trial/20395
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Availability of data and material
All data will be made available upon request.
Abbreviations
- BP:
-
Blood pressure
- hs-CRP:
-
Lipid profile, high-sensitivity C-reactive protein
- MDA:
-
Malondialdehyde
- TAC:
-
Serum total antioxidant capacity
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Acknowledgements
Authors would like to thank all volunteers who participated in the study. The current study was a part of the master thesis of Parvin Joola. The vice chancellor for research affaire of Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran, supported the current study (grant number: NRC-9404).
Funding
Funding for this study was provided by Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
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FSH, PJ, and ASM designed the study and involved in the data collection, analysis, and drafting of the manuscript. PJ and MAJ were involved in the design of the study, analysis of the data, and critically reviewed the manuscript. All authors read and approved the final manuscript.
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This study was approved by Research Ethics Committee of Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran (code 1394.103REC IR.AJUMS), and registered in IRCT clinical trial database (code N1 2015091624049). Furthermore, the necessary details of the project were explained clearly to the patients or their first-degree relatives, and written informed consent was obtained from them before they joined the study.
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The authors declare that they have no competing interests.
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Shishehbor, F., Joola, P., Malehi, A.S. et al. The effect of black seed raisin on some cardiovascular risk factors, serum malondialdehyde, and total antioxidant capacity in hyperlipidemic patients: a randomized controlled trials. Ir J Med Sci 191, 195–204 (2022). https://doi.org/10.1007/s11845-021-02566-7
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DOI: https://doi.org/10.1007/s11845-021-02566-7