The best replacement for creatinine is creatine.

The best alternatives to creatinine are rated as following:
★★★★★  creatine
★★★  creatinine clearance
★★  bun
★★  gfr
★★  creatinine kinase
★  urea
★  creatine kinase
★  serum creatinine
  inulin
  creatinine
  plasma creatinine
  cystatin c
  pah
  egfr

Your alternative for creatinine is not listed? Suggest!
Speaking about creatinine, one probably shouldn't forget about egfr.

Other search terms related to creatinine and their ratings are:
★★★★★ egfr
★★★★ gfr
★★ glomerular filtration rate
★★ gfr test
★ microalbumin
★ normal bun
★ elevated bun
estimated gfr
proteinuria
chronic renal failure
kidney disease
picric
normal urea
You have in mind a companion for creatinine and it is not yet here? Propose!



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creatinine
creatine
creatinine clearance