Is it okay to drink water infused with Cornus officinalis (Chinese cornel)?
Drinking water infused with Cornus officinalis (Shanzhuyu) in moderation can generally be used for daily regulation, but it should be avoided in cases of damp-heat constitution or specific medical conditions. If in doubt, consulting a healthcare professional in advance is recommended. Detailed explanations are as follows:

For individuals with kidney deficiency, weak constitution, or low immunity, Cornus officinalis-infused water may help improve overall physical condition through its function of nourishing the liver and kidneys. Cornus officinalis is slightly warm in nature and has effects of nourishing the liver and kidneys, consolidating essence, and reducing frequent urination, thereby providing necessary nutritional support. Drinking it in moderation as part of daily wellness practices can help strengthen physical health and improve resistance.
However, for individuals with a damp-heat constitution or suffering from metabolic diseases such as diabetes, drinking Cornus officinalis-infused water may worsen discomfort or affect disease management. Its astringent nature may easily lead to internal accumulation of dampness, causing indigestion or other symptoms. Additionally, Cornus officinalis contains a certain amount of sugar, and excessive consumption may negatively affect blood glucose levels.
It is contraindicated for individuals allergic to Cornus officinalis or similar plants. After consumption, symptoms such as rash or itching may appear, and in severe cases, anaphylactic shock could occur. Immediate discontinuation and medical assistance are required in such situations.