A dose-response evaluation of purified anthocyanins on inflammatory and oxidative biomarkers and metabolic risk factors in healthy young adults: A randomized controlled trial

Nutrition. 2020 Jun;74:110745. doi: 10.1016/j.nut.2020.110745. Epub 2020 Jan 27.

Abstract

Objectives: Anthocyanins derived from different plant sources have been found to possess a variety of health-promoting effects, including antiinflammatory properties and protection from oxidative stress. The aim of this study was to investigate the dose-response relationship between anthocyanins and metabolic risk factors as well as inflammatory and oxidative biomarkers in healthy adult volunteers.

Methods: We conducted a randomized, double-blind, placebo-controlled trial, which included an increasing dosing schedule of 20, 40, 80, 160, and 320 mg of purified anthocyanins or placebo. Participants (n = 111) were administered either agent for 14 consecutive days.

Results: No significant differences in either baseline characteristics or daily intake of dietary nutrients were detected between the experimental and control groups. After anthocyanin supplementation, there was a significant difference in adjusted fasting plasma glucose levels. The group receiving 80 mg/d of anthocyanin had the lowest baseline-adjusted fasting plasma glucose when compared with placebo (F = 3.556, P = 0.007). Logarithmically adjusted plasma interleukin-10 levels were negatively correlated with increasing anthocyanin dose (F = 2.738, P = 0.025). Similarly, 8-iso-prostaglandin F2α levels decreased with increasing anthocyanins dose (F = 3.513, P = 0.009).

Conclusions: Taken together, our results suggest that anthocyanin supplementation at a dose greater than 80 mg/d is an effective antioxidant and antiinflammatory agent in healthy young adults.

Keywords: Anthocyanin; Dose-escalation trial; Inflammation; Oxidative stress.

Publication types

  • Randomized Controlled Trial

MeSH terms

  • Anthocyanins*
  • Biomarkers
  • Dietary Supplements*
  • Double-Blind Method
  • Humans
  • Oxidative Stress
  • Risk Factors
  • Young Adult

Substances

  • Anthocyanins
  • Biomarkers