Blood: creatinine 1.80; GFR 41. Follow-up labs 48 hrs later: creatinine 1.50; GFR 53. Imm% - 1.8; imm count -. 16. Wbc normal. No symptoms. 46-w-male?

Kidney down briefly? Both are a bit high for a man in his mid-40s especially if your bodybuilding days are over. Might you have been recovering from a subclinical bout of Ibuprofen nephropathy? It's very common and causes partial renal shutdown. Drink plenty of water if you use nsaids nad consider a follow at your next regular appointment.