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Effect of yerba mate and green tea on paraoxonase and leptin levels in patients affected by overweight or obesity and dyslipidemia: a randomized clinical trial.

  • 2019-01-19
  • Nutrition journal 18(1)
    • Guilherme Balsan
    • Lúcia Campos Pellanda
    • Grasiele Sausen
    • Thaís Galarraga
    • Denise Zaffari
    • Bruna Pontin
    • Vera Lúcia Portal
    • Vera Lúcia Portal

Study Design

Type
Randomized Controlled Trial (RCT)
Sample size
n = 142
Population
142 men and women affected by overweight or obesity aged 35-60 years, untreated dyslipidemia and no history of coronary artery disease
Methods
Controlled, randomized clinical trial; participants randomized to ingest 1000 mL GT, YM or apple tea (AT, control group) daily, during eight weeks
Blinding
Open-label
Duration
eight weeks
Funding
Unclear
  • Large Human Trial

Background

This study aimed to evaluate the effect of the intake of yerba mate (YM) and green tea (GT) on serum levels of leptin and paraoxonase-1 (PON-1), compared to control.

Methods

Controlled, randomized clinical trial (RCT) that evaluated 142 men and women affected by overweight or obesity aged 35-60 years, untreated dyslipidemia and no history of coronary artery disease. Participants were randomized to ingest 1000 mL GT, YM or apple tea (AT, control group) daily, during eight weeks. Serum PON-1 and leptin levels were analyzed by ELISA immunoassay at the beginning (baseline) and after eight weeks of intervention.

Results

The intake of 1 l of YM/day resulted in significant increase in serum levels of PON-1 (9.7%; p = 0.005). The consumption of GT induced no significant difference in the levels of PON-1 (p = 0.154) and leptin (p = 0.783). Intergroup analysis showed a significant difference (p = 0.036) in the variation of PON-1 levels in the YM group when compared to GT and AT groups. In addition, the increase in PON-1 levels in the YM group was significantly associated with increased HDL-c (p = 0.004).

Conclusions

The intake of yerba mate increased the antioxidant capacity by increasing serum levels of PON-1 and was positively associated with increased HDL-c, stressing the protective role of this beverage against atherosclerotic diseases. GT intake had no significant effect on serum levels of PON-1 and leptin.

Trial registration

This study is registered with ClinicalTrials.gov under protocol number NCT00933647.

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