From the doctor, if you have no kidney issues or dont have family with kidney issues you "should" be fine.
https://www.betterhealth.vic.gov.au/health/conditionsandtreatments/kidneys-nephrotic-syndrome
As I said, I had no idea that my kidneys weren't happy, the doc said I was lucky because of the testing I was having for the arthritis meds.
As for research, I believe most, if not all research in the supplement world is bias, the manufacturer or suppliers rarely say the supps they are pushing could be bad for you, and as for the so called independent testing, who paid for the testing and who did the testing, usually not alot of separation.
Creatine, I believe, has had the most research of anything supplement related, Ive found a few articles that have stated not to use it if you are susceptible to kidney problems.
Most people find out they are susceptible to kidney problems when the symptoms get bad.
The creatine apparently doesnt damage your kidneys, but once the kidneys start playing up the creatine makes it worse, some how.
I recommend getting a blood test to anyone now, I hear too often stories about "fit and healthy people" dropping dead.
There was a story a while ago in relation to all the bodybuilders from the 80's and 90's dropping dead, mainly heart attacks and renal failure, most likely from roids but really, who knows.
https://www.t-nation.com/pharma/big-dead-bodybuilders