Can drinking water infused with Ophiopogon japonicus (McDoor) treat insomnia?
Generally, drinking water infused with Ophiopogon japonicus (Mai Dong) may be effective for insomnia caused by Yin deficiency with internal heat, but its effectiveness is limited for insomnia caused by other factors. If abnormalities occur, it is recommended to seek timely medical advice. Detailed analysis is as follows:

Ophiopogon japonicus has functions of nourishing Yin, clearing heat, moistening dryness, and calming the mind. If insomnia is caused by Yin deficiency with internal heat—for example, symptoms such as dry mouth and throat, irritability, and anger—appropriately drinking Ophiopogon-infused water may help alleviate these discomforts and thus improve sleep quality. Ophiopogon works by regulating the body's Yin-Yang balance and serves as an auxiliary treatment, particularly suitable for individuals with obvious symptoms of Yin deficiency.
If insomnia is caused by excessive emotional stress, irregular eating habits, environmental disturbances, or other similar reasons, the effect of Ophiopogon japonicus may not be ideal. Insomnia of this type usually requires addressing lifestyle adjustments or psychological conditions, and relying solely on Ophiopogon cannot resolve the underlying issues.
In addition, certain individuals with cold body constitution or weak spleen and stomach may experience adverse reactions such as diarrhea or stomach bloating after consuming Ophiopogon, which could further impair sleep quality.