Effects of L-citrulline supplementation on blood pressure: A systematic review and meta-analysis
Publish place: Avicenna Journal of Phytomedicine، Vol: 9، Issue: 1
Publish Year: 1398
نوع سند: مقاله ژورنالی
زبان: English
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JR_AJP-9-1_002
تاریخ نمایه سازی: 18 تیر 1398
Abstract:
Objective: We aimed to conduct a systematic review and meta-analysis of clinical trials that examined the effects of L-citrulline supplementation on blood pressure (BP). Materials and Methods: We searched MEDLINE, SCOPUS, PUBMED and Google scholar databases from inception to November 16, 2017 and 811 papers were identified, of which 8 trials with 10 data sets met the inclusion criteria. Inclusion criteria were: (1) application of randomized clinical trial with either crossover or parallel designs; (2) studies conducted in adults (≥18 y); (3) oral supplementation with L-citrulline compared to control group; (4) expression of sufficient data about systolic and diastolic BP at baseline and at the end of the study in each group. BP effects were pooled by random-effects models, with trials weighted by inverse variance. Results: The included studies’ sample size ranged between 12 and 34 subjects. The mean age of the participants in these trials ranged between 22 and 71 years. Dosage of L-citrulline supplementation varied from 3 to 9 g/day. Duration of the intervention ranged between 1 and 17 weeks. The pooled changes in systolic and diastolic BP were (MD, −4.10 mm Hg; 95% CI [−7.94, -0.26]; p=0.037) and (MD −2.08 mm Hg; 95% CI [−4.32, 0.16]; P=0.069), respectively. The subgroup analysis showed a significant diastolic BP reduction in studies that used doses of ≥6 g/day (MD −2.75 mm Hg; 95% CI [−5.37, -0.12]; p=0.04). Conclusion: Our results suggest that L-citrulline supplementation may reduce systolic BP. A significant reduction in diastolic BP was observed only in the studies that used doses ≥ 6 g/day.
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Authors
Bahareh Barkhidarian
Department of Nutrition, Mashhad University of Medical Sciences, Mashhad, Iran
Masoud Khorshidi
Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences (TUMS), Tehran, Iran
Sakineh Shab-bidar
Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences (TUMS), Tehran, Iran
Baran Hashemi
Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran.
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