Impact of daily green tea ( <i>Camellia sinensis</i> ) leaves consumption on stress, metabolism, and liver biomarkers in moderately stressed women

Abstract

Stress is a major concern with significant impacts on mental and physical health. Moderately stressed people's perceived stress, physiological reactions, and biomarkers related to stress. For this purpose, in this randomized clinical trial, a total of 108 females (25–45 years old) with moderate stress were enrolled and randomly divided into three groups: T0 (placebo tea), T1 (green tea 1 g/day), and T2 (green tea 1.5 g/day) for twelve weeks. The effects of green tea were measured using stress, physiological parameters, salivary cortisol, melatonin, alpha-amylase, glucose, liver enzymes, and C-reactive protein at baseline and post-intervention. Statistical analysis was conducted using SPSS, employing ANOVA (p < 0.05). The results showed that green tea, especially at a dose of 1.5 g, reduced stress, blood glucose, cortisol, and alpha-amylase levels while increasing melatonin levels and improving liver function. Green tea may support stress relief, metabolism, and liver health, but larger studies are needed to confirm.