What Is Palo Azul Tea? Palo Azul Tea Is An Herbal 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 Supplement For Thousands Of Years, And The Bark Is Known To Contain Some Very Unique Nutrients. When You Purchase Palo Azul, It Typically Comes In The Form Of Wood Chips Of The Bark, Which You Can Then Steep In The Water To Release The Flavonoids, Sterols, And Phenolic Compounds Found In This Powerful Plant. Blue Tinge Is Only Visible Under Direct Light At The Surface Of The Tea.