X2.
If you're over 35, chances are the bloodwork will show that kidneys are going to be stressed out due to creatine daily intake .... this told by a sports doctor with 25 years of experience .
and he has seen teenagers too with weak kidneys", Although teenagers are tend to be abusive and careless
WoooSHHHHHHHHHHH
Incorrect. It may appear as though the kidneys are failing, but it is a false positive.
Creatinine is the primary marker used to assess kidney function. It is a waste product that is produced by muscle tissues. Your muscles generate this chemical and it accumulates in the blood until it is removed from circulation by your kidneys. If your creatinine level falls within a normal range, your kidneys are likely functioning well.
Supplementing with creatine will lead to more creatinine in the blood than the body can filter out, leading to an artificially-high number on your labs. This is why your doctor may look at your bloodwork and say "your kidneys are failing". Stopping the supplementation will cause everything to return to normal.