Upto how many % total functioning of 2 kidney .creatinine level become below 1.3?

Question

Its true that referance range for a healthy adult male of creatinine is 0.7 -1.2 mg % But the creatinine values showed be interpretated in view of one?s muscle mass.As a patient with a greater muscle mass will have greater creatinine values.
One should thus rely on eGFR or Creatinine clearance to know their kidney function.Though also to note that these calculations are not valid in children ,pregnant women,very obese and very lean ,malnourished people,patient with muscle disease or both legs paralysis or even those with rapidly changing kidney function.

But in general , in a non dehydrate adult male , consider a value of creatinie more than 1.5 and rather speaking importantly a increasing value of creatinine would be dangerous.

Sajeev Kumar · Accepted Answer

Its true that referance range for a healthy adult male of creatinine is 0.7 -1.2 mg % But the creatinine values showed be interpretated in view of one?s muscle mass.As a patient with a greater muscle mass will have greater creatinine values.
One should thus rely on eGFR or Creatinine clearance to know their kidney function.Though also to note that these calculations are not valid in children ,pregnant women,very obese and very lean ,malnourished people,patient with muscle disease or both legs paralysis or even those with rapidly changing kidney function.

But in general , in a non dehydrate adult male , consider a value of creatinie more than 1.5 and rather speaking importantly a increasing value of creatinine would be dangerous.