Hi Guys had bloodwork done a while back. I've been having foamy urine for the past 4 months on and off. It's not constant but it is kind of freaking me out. I'm 26 I am overweight due to hypothyroidism (currently on treatment). Anyways, my GFR rate as of last months was I believe somewhere around 107-110 which from what I understand is perfect. My question is if my kidney's are filtering good what else can be causing the foamy urine?