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Coffee on an empty stomach

by (13)
Updated about 22 hours ago
Created October 03, 2010 at 10:20 PM

Any thoughts on if drinking coffee (espresso) on an empty stomach is a bad idea? I usually reach for 1-2 shots in the morning on an empty stomach and my first meal wouldn't be until at least a few hours after waking.

I haven't noticed any ill effects but I'm wondering if this is a bit of an acid load on my stomach/digestive system.. has only recently struck me as an issue as scheduling has pushed by my first meal of the day mon-fri.

Cacc89096bbbec20ff6904cbbd58e92d
273 · October 14, 2010 at 1:40 PM

Great question, this has been a habit of mine for years.

6426d61a13689f8f651164b10f121d64
11478 · October 04, 2010 at 1:25 AM

@JakeA: done.

1ec4e7ca085b7f8d5821529653e1e35a
5516 · October 04, 2010 at 12:20 AM

Thank you for the informative answer. As a coffee die hard can you spell it "espresso" though? :)

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3 Answers

6426d61a13689f8f651164b10f121d64
6
11478 · October 03, 2010 at 10:41 PM

The pH of espresso is similar to the pH of regular coffee, which is 4.9 to 5.2 ( http://www.answerbag.com/q_view/1985048 ). The pH of the human stomach is 2 to 3 ( http://www.suite101.com/content/the-human-stomach-a52808 ). Since pH is a log scale, the stomach is normally 100 to 1000 times as acidic as a cup of espresso. So the acid is probably not a problem.

If you're prone to gastro-esophageal reflux (GERD), the one thing I would be cautious about is the caffeine. Caffeine can aggravate GERD ( http://digestive.niddk.nih.gov/ddiseases/pubs/gerd/ ), and a serving of espresso typically contains 58 to 185mg of caffeine ( http://www.energyfiend.com/caffeine-content/espresso ). A shot (1 to 2oz.) of espresso contains a similar amount of caffeine as a 7oz. serving of regular coffee ( http://coffeefaq.com/site/node/18 ).

Since espresso is similar to regular coffee in pH and caffeine content, it's probably no worse for you in the morning (or any other time of day) than regular coffee.

6426d61a13689f8f651164b10f121d64
11478 · October 04, 2010 at 1:25 AM

@JakeA: done.

1ec4e7ca085b7f8d5821529653e1e35a
5516 · October 04, 2010 at 12:20 AM

Thank you for the informative answer. As a coffee die hard can you spell it "espresso" though? :)

25ed4acfb632d928507f8673bcb0923a
1
650 · October 03, 2010 at 11:16 PM

There may be some compounds in some types of coffee that could increase gastric acid secretion but it's not clear yet. Veronica Somoza and Thomas Hofmann are the big names who are currently doing research on this topic. See http://pubs.acs.org/doi/abs/10.1021/jf903614d, for example.

1153fbd07055edb0b729e2249f455477
-1
-38 · November 29, 2012 at 1:20 AM

its not good to drink espresso on an empty stomach. always good to have a cup of organo gold though...after meals http://mycapturepage.com/cp23.php?id=470

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