When prepared with whole barley it cleanses, swiftly penetrating and provides “a subtle nourishment”.
It is best to drink it hot as it cleanses more quickly and effectively. It increases the innate heat and sticks to the stomach lining.
It is also very good for coughs and sore throats
As-Suyuti says, “Hippocrates said, ‘Barley water has ten good properties, for it is both sticky and smooth. It is the best food for treating hot diseases.’”
This Journal entry is based entirely on the following sources:
Ibn Qayyim in "Medicine of the Prophet"
As-Suyuti in "Medicine of the Prophet"