creatinine
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Creatine Purity: Testing for Creatinine and By-Products
Three specific compounds tell an analyst whether creatine was synthesised carefully or rushed, and all three are routinely measured.
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Kidney Function Testing: Creatinine, eGFR and Cystatin C
eGFR is not measured. It is calculated from creatinine, age and sex, which is why muscle mass and the choice of equation can move the number…
