That’s an interesting point. I have just asked Gemini about links between cystatin C and ferritin and it did not give an answer that would imply a low ferritin would result in a high cystatin C. Do you have any further from gemini on this.

59 y.o. male
eGFR- creatinine - 102
eGFR -cystatin C - 78

According to Gemini, my relatively poor cystatin c is due to low ferritin 11 (which I have now bumped up to 31), and dehydration.

While I find this info interesting all the causes combined account for only 70% of deaths, the other 30% is significant also and I wonder what it might be? I would have thought all these factors should have amounted to over 90% at least.

Interesting

I take 12mg daily but maybe thats too high

I recall the human equicalent is 4 to 8mg maybe i am wrong

the time between blood draw and testing is a material issue

Yes, I am mindful of the time lapse. Labcorp seems to have more of a backlog than my local hospital, though even there the waiting rooms are often jammed.