Volbura tea, 50 g, Stef Mar Valcea Composition Stems, leaves and flowers of the convolvulus arvensis L., fam. Convolvulaceae. Administration: 1 cup/day, to be drunk in the morning on an empty stomach. Action: Purgative; stimulates bile secretion and helps eliminate bile in the intestine. Use: Traditionally, in constipation, biliary dyskinesia, cholecystitis. Method of preparation: Infusion: Pour a cup of boiling water over 1 tablespoon of the product, cover for 10-15 minutes, then strain and consume at room temperature. Presentation: 50 g