What Are the Benefits of Drinking Overnight Tea?

Most people are aware that drinking tea offers certain health benefits. However, some individuals tend to store brewed tea overnight and consume it the following day—commonly referred to as “overnight tea.” Yet, many are unaware that overnight tea may also confer specific health advantages. So, what are the potential benefits of drinking overnight tea?

Benefits of Drinking Overnight Tea

Drinking overnight tea may offer several benefits, including anticancer and antioxidant effects, hemostasis (stopping bleeding), improved vision, itch relief, promotion of hair growth, strengthening of teeth, elimination of bad breath, sun protection, removal of fishy odors, reduction of greasiness, relief of constipation, and treatment of athlete’s foot. The anticancer and antioxidant properties stem from prolonged storage: over time, tea turns reddish-brown due to oxidation of tea polyphenols into reddish-brown tea pigments. Both tea polyphenols and tea pigments possess potent anticancer and antioxidant activities. Overnight tea is relatively acidic, which helps prevent capillary bleeding. For conditions such as oral inflammation, glossitis, eczema, or gingival bleeding, rinsing the mouth with overnight tea may help treat abscesses and skin bleeding; the tea polyphenols in overnight tea exhibit antibacterial and anti-inflammatory effects.

If overnight tea is stored in a damp environment and exposed to air, it may become contaminated with bacteria, fungi, or other microorganisms. Moreover, in dimly lit nighttime conditions, insects may enter the tea unnoticed; consuming such contaminated tea could lead to gastrointestinal symptoms—including nausea, abdominal pain, and diarrhea. Additionally, prolonged standing allows tea pigments to fully dissolve into the liquid, potentially causing yellowing of teeth if consumed excessively over time.

In daily life, patients should avoid drinking tea stored for more than 24 hours, as this may cause harm to the body and trigger various discomforts. We hope this information proves helpful!