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The "Black Periods" for Tea Drinking

Tea News · Dec 16, 2025

On an empty stomach

Because tea leaves contain alkaloids such as caffeine, drinking tea on an empty stomach can lead to excessive absorption of caffeine in the intestines, causing overstimulation symptoms like palpitations, dizziness, weakness, and mental confusion in some individuals. Those unaccustomed to tea, especially when drinking it in the morning on an empty stomach, are more prone to these symptoms. This is referred to as being "tea drunk." If tea drunkenness occurs, sucking on candy or drinking sugar water can help alleviate it. Compared to younger people, the elderly have more fragile digestive systems. Middle-aged and older adults with gastric or duodenal ulcers should avoid drinking tea on an empty stomach, particularly strong tea, as excessive tannins can irritate the gastrointestinal mucosa, worsening their condition and potentially causing indigestion or constipation.

While intoxicated

Tea stimulates the central nervous system. Drinking strong tea after alcohol consumption can increase the burden on the heart. For the elderly with poor heart or kidney function, it is especially important not to consume large amounts of strong tea after drinking. Instead, methods such as eating plenty of fruit or sipping vinegar can be used to accelerate the body's metabolism and relieve intoxication.

Before bedtime

Substances like theophylline in tea, once absorbed by the body, have a noticeable stimulating effect on the central nervous system. Drinking tea can lead to mental excitement, disrupt sleep, and even cause insomnia. This effect is more pronounced with freshly picked green tea. Additionally, tea has diuretic properties, making elderly individuals more prone to frequent nighttime urination if they drink tea before bed, which can affect sleep quality.

During medication periods

Some elderly individuals with chronic illnesses require long-term medication, and many drugs should not be taken with tea. Examples include sedatives, sleep aids, and anti-arrhythmic drugs. Theophylline can reduce the analgesic effects of certain medications, so tea should also be avoided when taking pain relievers.

For many retirees, enjoying a cup of tea while reading the newspaper represents an ideal leisurely life in their later years. However, everything has two sides. While tea offers health benefits, it also requires careful consideration. Drinking tea at the wrong time may harm health. Elderly tea drinkers should avoid the following four time periods.

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