As a child, I was diagnosed with nephritis due to blood in my urine after soccer games. My doctor expected symptoms to disappear as I got older, and they did: I m now 33 years old; I had a physical as recently as last fall, and all of my blood levels (including creatinine) were normal. I regularly enjoy weightlifting, but I don t take creatine due to concerns about kidney damage. However, I m interested in a supplement called kre-alkalyn, which claims to limit (or completely avoid) creatine s breakdown into creatinine. Is this a product I could try?