Effect of Nigella sativa Intake on Oxidative Stress and Inflammation in Patients with Metabolic Syndrome and Related Disorders: A Systematic Review and Meta-analysis of Randomized Controlled Trials.

Abstract

Several studies have shown that the intake of N. sativa has a beneficial effect on metabolic syndrome and related disorders. In this meta-analysis, our primary objective was to assess the impact of Nigella sativa consumption on inflammation and oxidative stress biomarkers among individuals diagnosed with metabolic syndrome and its associated conditions. Our search was conducted on prominent online databases such as Web of Science, Scopus, PubMed, and EMBASE, utilizing relevant keywords until August 2023. This meta-analysis was performed on 16 RCTs comprising 1033 participants. Our results showed that intake of nigella sativa significantly decreased CRP [SMD: -0.60; (95% CI: from -0.96 to -0.23); P = 0.00], TNF-α [SMD: -0.53; (95% CI: from -0.74 to -0.53); P = 0.00]; IL-6 [SMD: -0.54 ; (95% CI: from -1.01 to -0.07); P = 0.02], and MDA: [SMD: -1.28; (95% CI: from -2.11 to -0.46); P = 0.00] levels. In addition, SOD: [SMD: 1.35; (95% CI, from 0.77 to 1.93); P = 0.00] and TAC [SMD: 2.82; (95% CI, from 0.55 to 5.084); P = 0.01] levels significantly increased in the intervention group compared to the placebo group. Our results showed that THE consumption of N. sativa could be associated with improved oxidative stress and inflammation in patients with metabolic syndrome and related disorders.