Isn't 20+ grams a day a lot for the kidneys? genuine question
Elevated creatinine levels (in absence of supplementation) is a sign of kidney issues. There are many studies showing no reverse link i.e. supplementing creatine damaging kidneys
https://link.springer.com/content/pdf/10.1186/s12882-025-045...
Not the parent, but someone else commented on this: https://news.ycombinator.com/item?id=48347735
Elevated creatinine levels (in absence of supplementation) is a sign of kidney issues. There are many studies showing no reverse link i.e. supplementing creatine damaging kidneys
https://link.springer.com/content/pdf/10.1186/s12882-025-045...