Background: Osteoporosis (OP) is one of the most prevalent metabolic bone diseases at higher ages, especially in postmenopausal women. 

Objective: To determine the effect of consumption of garlic tablet on proteins oxidation biomarkers in postmenopausal osteoporotic women. 

Methods: The present study was a double-blind randomized controlled clinical trial that included 42 postmenopausal women in Yazd during 2014-2015. Osteoporotic women were randomly assigned into two groups: the garlic group (GG) and the placebo group (PG). Participants in GG took two garlic tablets daily for 1 month and the participants in PG took placebo tablets in the same manner. After 30 days, the plasma level of carbonyl groups (PCO), total antioxidant capacity (TAC), and advanced oxidation protein products (AOPPs) were assessed by spectrophotometric assays. Also, Malondialdehyde (MDA) content was measured according to the procedure of Thiobarbituric Acid (TBA). Data were analyzed by SPSS version 18, using paired-samples t-test, independent-samples t-test, Wilcoxon, and Mann-Whitney U test.

Results: This study showed that garlic tablets had decreased PCO plasma levels (47.37±5.98 vs. 19.62±3.40 nM, p≤0.001, before and after the study, respectively), AOPPs (738.95±151.86 vs. 585.12±209.99 µM, p≤0.008, before and after the study, respectively), and increased TAC (11.34±10.80 vs. 47.93±17.80, p≤0.001, before and after the study, respectively). The parameters in placebo groups showed no significant differences before and after the study, respectively. The levels of MDA before taking the drug in comparison to before Garlic group was also reduced (1.30±1.04 vs. 0.92±0.81 µM, p=0.01, before and after the study, respectively). 

Conclusion: The role of oxidative stress in the pathophysiology of many diseases such as osteoporosis has been demonstrated. The present study showed that garlic consumption can reduce the oxidative stress.

Trial registration: The protocol of trial was registered at the Iranian clinical trial register (www.irct.ir) with ID: IRCT138811183273N1.

Funding: This study funded by Shahid Sadoughi University of Medical Sciences (Yazd, Iran).


Keywords: Oxidative stress, Osteoporosis, Garlic tablets
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