http://www.jissn.com/content/10/1/26
"A 12-week creatine supplementation protocol did not affect kidney function in resistance-trained healthy individuals consuming a high-protein diet; thus reinforcing the safety of this dietary supplement."
http://www.ncbi.nlm.nih.gov/pubmed/15886291
"CONCLUSIONS: Creatine supplementation minimally impacts creatinine concentrations and renal function in young healthy adults. Although creatinine concentrations may increase after long periods of creatine supplementation, the increase is extremely limited and unlikely to affect estimates of creatinine clearance and subsequent dosage adjustments. Further studies are required in the elderly and patients with renal insufficiency."
I don't know the details of his disease nor the usefulness of these studies.
http://www.jissn.com/content/10/1/26
"A 12-week creatine supplementation protocol did not affect kidney function in resistance-trained healthy individuals consuming a high-protein diet; thus reinforcing the safety of this dietary supplement."
http://www.ncbi.nlm.nih.gov/pubmed/15886291
"CONCLUSIONS: Creatine supplementation minimally impacts creatinine concentrations and renal function in young healthy adults. Although creatinine concentrations may increase after long periods of creatine supplementation, the increase is extremely limited and unlikely to affect estimates of creatinine clearance and subsequent dosage adjustments. Further studies are required in the elderly and patients with renal insufficiency."
I don't know the details of his disease nor the usefulness of these studies.