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Green tea extract improved fat tissue function in study involving overweight or obese postmenopausal women

After menopause, green tea may help with fat tissue

Women who consumed green tea extract daily showed improvements in their fat tissue, according to a trial reported in the December 7, 2022, issue of Nutrients.1 The study participants were overweight or obese and had gone through menopause, a phase in life when there is often an increase in abdominal (visceral) fat. This is particularly worrisome because increased fat deposited around the abdominal organs secretes proinflammatory chemicals that increase the risk of metabolic disorders.

While weight gain itself may not be due to menopause and appears to gradually increase with aging, hormonal changes caused by ovarian aging can affect body composition by increasing total body fat.

Women who received green tea extract had improvements in indicators of adipose (fat tissue) health, including specific metabolic markers, compared to a group that received a placebo. They also showed improvements in insulin and insulin resistance, waist circumference and C-reactive protein (CRP, a marker of inflammation) at the end of the trial.

"These results demonstrate that a 60-day green tea extract [intake] counteracts the dysfunction of adipose tissue in overweight postmenopausal and class I obese women," authors Mariangela Rondanelli of the University of Pavia and colleagues concluded.

The 60-day trial included 28 overweight or obese inactive women who were an average age of 58.75 years old. Half of the women received 150 milligrams of a green tea extract that contained between 19% and 25% beneficial catechins and at least 13% EGCG (the major catechin in green tea) and the remainder of the participants received a placebo for 60 days.

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Apply What You’ve Learned: Green Tea

  • Green tea, a traditional beverage in China, has gained popularity in the Western world due to the discovery of its many health benefits, which have been attributed, in part, to the tea's high antioxidant content. Made from unfermented leaves of the Camilla sinensis plant, hot or iced green tea has become a popular beverage and can even be found in skin care products.
  • Maintenance of healthy cell reproduction, and metabolic and cardiovascular function are among several aspects of health that are benefitted by green tea.2-4 Green tea also helps support brain health.5-6
  • Green tea contains L-theanine, an amino acid that has been found to have a calming effect without producing drowsiness.7-8
  • While many people drink green tea by the pot due to its delicious taste, others prefer the ease of consuming green tea extract, which provides concentrated amounts of green tea's health-giving polyphenols, including EGCG.

References

  1. Rondanelli M et al. Nutrients. 2022 Dec 7;14(24):5209.
  2. Fujiki H et al. J Cancer Prev. 2015 Mar;20(1):1-4.
  3. Li X et al. Clin Nutr. 2020 Apr;39(4):1049-1058.
  4. Pang J et al. Int J Cardiol. 2016 Jan 1;202:967-74.
  5. Pervin M et al. Int J Mol Sci. 2019 Jul 25;20(15):3630.
  6. Mancini E et al. Phytomedicine. 2017 Oct 15;34:26-37.
  7. Kimura K et al. Biol Psychol. 2007 Jan;74(1):39-45.
  8. Unno K et al. Pharmacol Biochem Behav. 2013 Oct;111:128-35.

Featured Life Extension Magazine® Article

How Capsaicin Burns Body Fat
By Michael Downey

Research has revealed a role for capsaicin from red chili peppers in increasing resting energy expenditure to support healthy weight.

A challenge associated with consuming capsaicin is digestive tract irritation. However, a new process that involves encapsulating capsaicin in a plant fiber hydrogel prevents capsaicin from causing gastrointestinal discomfort. People who consumed this encapsulated capsaicin daily had a 2.1% decrease in body weight at the end of a four-week trial while a group that received a placebo had only a 0.32% reduction. The capsaicin group also experienced greater reductions in waist-to-hip ratio and body mass index (BMI) in comparison with the placebo group.

By increasing resting energy expenditure, consuming capsaicin results in more calories burned, even when the body is at rest.

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