Is Coffee Giving You Heartburn? Try a Darker Roast!

  • Author: Lisa-Marie Rauschendorfer
  • Published: 08 March 2014
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
  • Source / Publisher: Molecular Nutrition & Food Research/Wiley-VCH
thumbnail image: Is Coffee Giving You Heartburn? Try a Darker Roast!

Coffee consumption sometimes is associated with symptoms of stomach discomfort, such as heartburn. Several compounds found in coffee, such as caffeine, chlorogenic acids (CGAs), ßN-alkanoyl-5-hydroxytamides (C5HTs), trigonelline, and N-methylpyridinium (N-MP), are assumed to irritate the stomach. In particular, C5HTs stimulate the secretion of gastric acid, thus resulting in discomfort.

Veronika Somoza, University of Vienna, Austria, and colleagues analyzed the amounts of the these compounds found in dark- and medium-roasted coffee by HPLC-DAD and HPLC-MS/MS. The dark-roasted coffee shows lower amounts of C5HTs, CGAs, trigonelline, and N-MP, whereas the caffeine content is the same. They subsequently investigated the effect on the secretion of gastric acid for nine healthy volunteers after they consumed dark- or medium-roasted coffee with a pH-sensitive capsule, which, after being swallowed, sends out signals about the gastric pH. The results show that less gastric-acid secretion occurred after drinking the dark-roasted coffee compared to the medium-roasted blend. However, future studies are required to verify whether it is the high ratio of N-MP to C5HT and CGAs that is beneficial for reducing gastric-acid secretion.

Article Views: 4421

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

If you would like to reuse any content, in print or online, from, please contact us first for permission and consult our permission guidance prior to making your request

Follow on Facebook Follow on Twitter Follow on YouTube Follow on LinkedIn Follow on Instagram RSS Sign up for newsletters

Magazine of Chemistry Europe (16 European Chemical Societies) published by Wiley-VCH