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Why Iced Tea May Cause Stomach Cramps

Mar 21, 2025 Source: Cainiu Health
Dr. Shen Yonghua
Introduction
Under normal circumstances, iced tea may cause stomach cramps due to several factors including low-temperature stimulation, irritation from tea components, excessive sugar intake, drinking too quickly, allergy, or intolerance. The low temperature of iced tea can cause blood vessels in the stomach mucosa to constrict and reduce blood circulation in the stomach upon entering the gastrointestinal tract, thereby affecting normal digestive function. At the same time, the cold temperature can directly stimulate the smooth muscles of the stomach.

Generally, iced tea may cause stomach cramps due to several factors including cold temperature irritation, tea component irritation, excessive sugar intake, rapid consumption, allergies, or intolerance. The specific reasons are as follows:

1. Cold temperature irritation: Iced tea is served at a low temperature, which causes the blood vessels in the stomach lining to constrict and reduces blood circulation in the stomach, affecting normal digestive function. Additionally, the cold temperature directly stimulates the smooth muscles of the stomach, causing sudden and strong contractions that may lead to stomach cramps.

2. Tea component irritation: Tea contains substances such as caffeine and theophylline, which can irritate the stomach lining to some extent. Drinking iced tea on an empty stomach or consuming highly concentrated iced tea may increase gastric acid secretion due to caffeine and theophylline, irritating the stomach lining and potentially causing stomach cramps.

3. Excessive sugar intake: Many iced teas contain large amounts of added sugar. Excessive sugar can ferment in the stomach, producing gas that increases gastric pressure, causing discomfort symptoms such as bloating and stomach pain, and in severe cases, may lead to stomach cramps.

4. Rapid consumption: When drinking iced tea, one may consume large quantities quickly due to thirst. This can cause sudden stomach expansion, overstretching the stomach wall muscles, which may easily lead to stomach cramps. Additionally, rapid drinking may cause air to enter the stomach along with the iced tea, leading to gas accumulation in the stomach and worsening discomfort.

5. Allergy or intolerance: Some individuals may be allergic to certain components in tea or intolerant to additives in iced tea (such as flavorings, colorings, etc.). After consuming iced tea, the body may experience allergic reactions or intolerance symptoms, such as stomach cramps, abdominal pain, diarrhea, and other discomforts.

It is recommended to avoid or limit the consumption of iced tea in daily life, especially when the stomach is empty or experiencing discomfort. If symptoms such as stomach cramps occur, timely medical attention should be sought and treatment followed as advised by a physician.

References:

[1] Peng Mingquan. Complete Book of Chinese Diet and Nutrition [M]. Chengdu: Sichuan Science and Technology Press, 2005.

[2] Sun Changhao. Nutrition and Food Hygiene [M]. 9th Edition. Beijing: People's Medical Publishing House, 2018.

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