Dark chocolate could be stress buster

By Jane Byrne

- Last updated on GMT

Related tags: Dark chocolate, Metabolism, Bacteria

Daily consumption of 40 grams of dark chocolate for two weeks can reduce stress and benefit metabolism and microbial activity in the gut, claims scientists based at the Nestle Research Centre.

In a study published in Journal of Proteome Research​ the Lausanne based researchers said their results show that eating dark chocolate daily reduced stress hormone levels in those who had high anxiety levels.

The authors maintain that there is growing pool of evidence pointing to the potential health implications of dark chocolate constituents, with the flavonoids in cocoa linked to better cardiovascular health through the maintenance of low blood pressure, improved endothelial function, and a reduction in thrombotic, oxidative and inflammatory states.

However, they claim that the mechanisms of action of chocolate bioactive components at the molecular levels are poorly understood, particularly in the case for benefits related to brain health and improvement of stress states where only symptomatic data, such as brain blood flow, are available

Study

The researchers said that, in order to evaluate the metabolic changes associated with dark chocolate consumption they looked at the effects of eating 40 grams of dark chocolate every day for two weeks on blood and urine measures of stress in 30 healthy adults.

They explained that they used nuclear magnetic resonance (NMR) spectroscopy and mass spectrometry (MS) to study changes in metabolism, and that the subjects completed psychological questionnaires, to enable them to be grouped into low and high anxiety traits.

Half of the chocolate was eaten mid-morning and the other half was eaten mid-afternoon, according to the study.

The authors stated that they took urine and blood plasma samples from the participants at the beginning, halfway through, and at the end of the two week study.

Results

The researchers said the results show that they were lower levels of stress hormones in the samples at the end.

“Dark chocolate reduced the urinary excretion of the stress hormone cortisol and catecholamines,”​ they reported.

The authors conclude that subjects with higher anxiety trait had a distinct metabolic profile, and that this profile was indicative of a different energy homeostasis, hormone metabolism, and gut microbe activity, and that dark chocolate also partially normalized stress-related differences in energy metabolism and gut microbial activities.

Source: Journal of Proteome Research
Published online ahead of print: DOI: ​10.1021/pr900607v
Title: Metabolic Effects of Dark Chocolate Consumption on Energy, Gut Microbiota, and Stress-Related Metabolism in Free-Living Subjects
Authors: S. Kochhar et al

Related news

Related products

show more

Exploring Fiber Fermentation Profiles

Exploring Fiber Fermentation Profiles

Tate and Lyle | 27-Apr-2018 | Technical / White Paper

ProDigest developed the Simulator of the Human Intestinal Microbial Ecosystem (SHIME®), which explores the fermentation profiles of fibers and evaluates...

Harmonizing food & drinks internationally

Harmonizing food & drinks internationally

Leatherhead Food Research | 17-Apr-2018 | Technical / White Paper

To the untrained eye, food and beverage legislation spanning international markets may look similar, but the reality is that it is fraught with complexity...

Related suppliers

Follow us

Featured Events

View more

Products

View more

Webinars