Why drinking coffee in the morning can easily cause nausea.

Acid reflux

According to a study published in October 2018 in Scientific Reports , the pH of most coffees ranges from 4.85 to 5.10, which is above acidic on the pH scale.

The stomach is naturally acidic, and drinking coffee increases its acidity. These acids can speed up the digestion of food, which is why some people feel the urge to urinate after drinking coffee.

Lý do uống cà phê buổi sáng dễ bị buồn nôn- Ảnh 1. — Drinking coffee before breakfast could be the reason we feel nauseous.

According to the Cleveland Clinic (USA), the acid content in coffee can cause digestive symptoms such as heartburn, acid reflux, and bloating. These symptoms are caused by stomach acid flowing back up into the esophagus.

Because coffee can trigger acid reflux, people with chronic acid reflux disease (GERD) may be more prone to nausea after drinking coffee.

Drink coffee on an empty stomach.

The habit of enjoying a cup of coffee right before breakfast could be the reason we feel nauseous. Some people may even experience severe nausea after drinking coffee on an empty stomach, according to livestrong .

"Coffee is highly acidic, and drinking it on an empty stomach can easily irritate the stomach lining, causing nausea in some people," shared Mehak Naeem, a Pakistani nutritionist.

Besides its acidity, the caffeine in coffee is also a culprit in causing nausea. According to a study published in July 2017 in the journal of the National Academy of Sciences of the United States (PNAS), caffeine is a stimulant that promotes the secretion of gastric juice, a fluid that aids in the digestion of food.

"Caffeine stimulates the release of gastrin. When produced in excess, this substance can cause stomach problems and nausea. So, eat something before drinking coffee," advises Naeem.

Side effects of certain medications

Some medications have side effects that interact with caffeine in coffee, causing nausea. According to AARP, these medications include antibiotics (such as Cipro), some antidepressants (such as MAOIs), and asthma medications (such as salbutamol and theophylline).

Jenna Volpe, a registered dietitian in the US, shared: "Nausea is one of many possible side effects due to interactions between caffeine and medication. People should always carefully check the label when taking any medication to avoid drug-food interactions."

According to the U.S. National Library of Medicine, if you frequently experience nausea when drinking coffee, you can reduce your coffee intake. This can be done gradually by switching to a lower-acid coffee, adding milk or cream to your coffee, and so on.

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