What Is Palo Azul Tea? Palo Azul Tea Is An Herbal Diuretic Tea Brewed With The Bark Of The Palo Azul Plant, Scientifically Known As Eysenhardtia Polystachya. Also Known As Kidneywood, This Herb Has Been Used In Traditional Medicine For Thousands Of Years, And The Bark Is Known To Contain Some Very Unique Nutrients. Snackadilly Naturals Is A Direct Importer Of This Special Herbal Tea From Responsible Growers That Grow & Package These Wood Chips By Hand In The Mountainous Regions Of Mexico. Important! The Blue Tinge Will Only Be Activated When The Tea Is Dark & Held Under Direct Light. You Will Then See The Top Surface Of The Tea Turn Blue.