Hi and welcome to Healthcare magic.Thank you for the query.
It will not affect kindey results as kidney creatinine
is comin from protein metabolism
. Supplement creatine
goes thorugh some different metabolic phases. Its usefulness is debatable. Theoretically it will cause more supstrates for energy,but only if there is no enough natural supstrates for energy. So it may be helpful if tehre is no enough carbohydrates in your diet and it there is excessive exercise.
Wish you good health. Regards