In the latest episode of A Pinch of Salt check out 'Proteinuria - the common suspect', the most obvious whodunit in the pathophysiological process of kidney disease. Things are changing and I start being confused with the labile landscape of proteinuria. A huge number of mechanisms are presented and a large number of molecules are circulating or will circulate soon. In this pleasant tsunami of new ideas on the pathophysiologic mechanisms of proteinuria and the treatment options accompanying them, we’ll try to ask for help from the experts.We‘ll start unfolding this complex network with the precious assistance of a leader in the subject Professor Annette Bruchfeld from  Linköping University, Sweden, the Chair of ERA Immunonephrology Working Group.