Can leftover iced tea from the night before still be consumed?

Oct 13, 2022 Source: Cainiu Health

Dr. Wang Lei

Introduction

It is not recommended to drink iced tea beverages left overnight. When iced tea is exposed to air for an extended period, especially overnight, the sugar content in the beverage provides a favorable environment for bacterial or viral growth. Consuming contaminated iced tea may introduce harmful bacteria and viruses into the gastrointestinal tract, potentially disrupting gastrointestinal function and triggering conditions such as gastroenteritis.

It is not recommended to drink iced tea that has been left overnight.

Iced tea left overnight has been exposed to air for an extended period. Since iced tea contains abundant sugars, it provides a favorable environment for the growth of bacteria and fungi. As a result, harmful microorganisms may multiply in the beverage. Consuming contaminated iced tea can introduce bacteria and viruses into the gastrointestinal tract, potentially disrupting digestive function and triggering conditions such as gastroenteritis, leading to symptoms like diarrhea, abdominal pain, or bloating. Additionally, iced tea contains substances like polyphenols, which may oxidize when exposed to air over time, forming various compounds that are harmful to the body. Drinking large amounts of overnight iced tea may therefore cause gastrointestinal discomfort.

It is advisable to tightly seal any leftover iced tea and store it properly to prevent bacterial or fungal contamination. In daily life, avoid consuming other beverages that have been left overnight to protect your health. Also, note that iced tea should not be consumed together with seafood, milk, or mutton, as this may lead to indigestion.

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Is there any harm in adding ice cubes to tea?

Adding ice cubes to tea may have certain health risks. Tea contains abundant flavonoids, polyphenols, and other substances that help refresh the mind and prevent symptoms such as fatigue and weakness. However, adding ice cubes to tea may inhibit the production of digestive enzymes and could lead to the loss of nutritional components in the tea. Drinking iced tea on an empty stomach may also irritate the stomach.

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Can iced red tea and watermelon be consumed together?

Under normal circumstances, iced tea and watermelon can generally be consumed together. The main ingredients of iced tea are black tea and water; drinking it in moderation can help beautify the skin, promote saliva production, and quench thirst. Watermelon is also a common fruit, and its nutrients do not conflict with those in iced tea, so they can be eaten together.

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What causes urine to be the color of iced black tea?

Urine that appears the color of iced black tea may be caused by physiological factors or pathological conditions such as urinary tract infections or urinary stones. In women, during menstruation, a small amount of menstrual blood may mix with the urine, causing it to appear like iced black tea. This is a normal physiological phenomenon, and urine color typically returns to normal after the menstrual cycle ends, generally requiring no treatment.