Average Bmi Females In Germany What Does A Low GFR Mean In A Healthy Female?

What does a low GFR mean in a healthy female? - average bmi females in germany

I did return recently, the results of blood tests for kidney disease (GFR) is much lower than normal, according to my doctor. But I'm young (27), the average weight (112 kg, BMI of 19) and have normal blood pressure and cholesterol.

What could be causing this and what that means?

Thank you!