Since ancient times, the leaves of the blackberry plant have been used curatively, especially throughout Europe and Asia. For example, two thousand years ago, the roman army doctor Galenos had his soldiers chew blackberry leaves to strengthen gums and build up physical resistance; today, we know it was the vitamin C and tannins in the leaves that he was counting on to boost immunity and heal wounds. Blackberry leaves have high levels of tannins and vitamin C, and they are made into a tea that has proved beneficial as a remedy for diarrhea, a gargle for throat inflammations and a compress for wounds and rashes. The tea also helps regulate both heavy and light menstrual flow and is a gastrointestinal soother. It's a tea you can drink daily-it has no side effects. Sweeten its bitter taste with honey, or mix the leaves with other herbs for healing tea blends. Tea preparation For a mild tea, pour 1 cup of boiling water over 2 tsp. of dried leaves. Cover and let steep for 10 min.; strain. For a greater medicinal effect, make a decoction; Gently boil a handful of dried blackberry leaves in 1 qt. of water until about half of the water has boiled off. Drink 2-3 small cups of the tea daily.