Can you drink senna leaf water that has been left overnight?

Generally, it is not recommended to drink senna leaf water that has been left overnight, as this may affect its efficacy. It is advisable to follow medical guidance when using it. The detailed explanation is as follows:

Senna leaf is a traditional Chinese medicinal herb. Drinking water infused with senna leaves typically has effects of clearing heat, promoting bowel movement, relieving stagnation, and promoting diuresis. Overnight senna leaf water is generally not recommended for consumption, as the organic components in it may react with air, potentially reducing its medicinal potency and impairing therapeutic effectiveness.

If overnight senna leaf water has not been stored under refrigeration, bacteria and other microorganisms may multiply rapidly, leading to spoilage. Consuming such contaminated liquid may irritate the gastrointestinal mucosa and cause discomfort symptoms such as abdominal bloating and pain, potentially causing unnecessary harm to the body. To ensure the safety and effectiveness of senna leaf water, it is recommended to consult a healthcare professional before use, consume it as needed, and discard any remaining liquid after use.

In daily life, maintaining a light diet and increasing intake of vitamin-rich vegetables and fruits—such as tomatoes, carrots, grapefruits, and apples—can help boost immune function and support overall health.