The complexity of coffee and its impact on metabolism

in Journal of Endocrinology
Authors:
Huanan Zhang School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Yantai University, Yantai, China
Shenzhen Key Laboratory of Metabolic Health, Center for Energy Metabolism and Reproduction, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China

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John R Speakman Shenzhen Key Laboratory of Metabolic Health, Center for Energy Metabolism and Reproduction, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, UK
Institute of Health Sciences, China Medical University, Shenyang, Liaoning, China

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https://orcid.org/0000-0002-2457-1823

Correspondence should be addressed to J Speakman: j.speakman@abdn.ac.uk
DOI:
https://doi.org/10.1530/JOE-24-0075
Volume/Issue:
Volume 262: Issue 3
Article Type:
Review Article
Article ID:
e240075
Online Publication Date:
22 Jul 2024
Copyright:
© the author(s) 2024
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Coffee is one of the three most consumed beverages in the world. It is made by first roasting coffee beans, and then grinding and boiling or steeping the roasted beans in water (brewing). The process of roasting and brewing produces a complex mix of bioactive compounds, including methylxanthines (caffeine, theobromine, theophylline), diterpenes, chlorogenic acid, trigonelline, flavonoids, and hydroxycinnamic acid. In the body, these compounds may be metabolized to produce other bioactive compounds. For example, caffeine is primarily (80%) broken down by demethylation to produce paraxanthine. In the post-ingestion period, levels of paraxanthine may be higher than caffeine due to its slower elimination. Hence, while paraxanthine is not found in coffee itself, it has many of the same properties as caffeine and may be a major contributor to its metabolic effects. The impacts of caffeine and paraxanthine on metabolism relate to their impact on adenosine receptors (notably the A2A receptor). It has been known for almost 100 years that intake of coffee stimulates metabolism by between 5% and 20% for at least 3 h. About half of the increase in metabolic rate after drinking coffee is due to caffeine and derivatives, but the source of the other half is unclear. There are large differences in the response to the same amount of coffee in different individuals, which may be related to caffeine clearance rates, effects of other unknown pathways, genetic polymorphism, age, sex, and body composition.

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Print ISSN:
0022-0795
Online ISSN:
1479-6805
Copyright:
© the author(s) 2024
Article ID:
e240075
Article Type:
Review Article
Received Date:
01 Mar 2024
Accepted Date:
17 Jun 2024
Print Publication Date:
01 Sep 2024
Online Publication Date:
22 Jul 2024
Keywords:
caffeine; coffee; diterpenes; metabolic rate; caffeine clearance; gene polymorphism

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