Effect of alpha-lipoic acid on oxidative stress parameters: A systematic review and meta-analysis

Abstract

The antioxidant effect of alpha-lipoic acid (ALA) and its effect in reducing reactive oxygen species has been demonstrated in primary studies. This systematic review and meta-analysis was conducted to evaluate the impact of alpha-lipoic acid (ALA) supplementation on oxidative stress (OS) parameters. We performed a comprehensive search in major electronic databases. A random-effects model was used to pool data and calculated standard mean difference and 95% confidence intervals. Fifteen studies were included in the meta-analyses. The outcomes of this meta-analysis indicated that ALA consumption significantly decreased Malondialdehyde (MDA) levels compare to control group. We found no significant effect of ALA supplementation on other antioxidant enzymes and oxidative stress parameters. Overall, the present meta-analysis indicated that ALA supplementation might lead to an amelioration in lipid peroxidation. It can be recommended that the use of ALA supplementation in < 800 mg/day is a good choice to control lipid peroxidation.

Keywords

• Alpha-lipoic acid
• Oxidative stress
• Malondialdehyde
• Total antioxidant capacity