My son is 16 years old 5'10" 162 lbs. i was told his creatinine level was a bit high (1.1). what does this mean?how will this affect him?

Don't worry. : Although we use serum creatinine levels to estimate kidney function, a "normal" level will vary based on age, sex, muscle mass, and other variables. Also, medications can affect the level without necessarily affecting kidney function per se. Confusing, i know. Based on your son's size which you shared, it is unlikely he has kidney disease, and his doctor could simply repeat the blood test.

Whoa: Unless junior's personal physician very much disagrees, i'd ignore it. The "reference range" was set for non-exercising adults. Any teenaged boy with good muscles will have creatinine 1.1 or higher; in whole classes of athletic med students, most men had creatinine above this. When i was lifting daily, mine was 1.6; a bodybuilder often has 2.0. Too many lawyers and too little common sense.