Your muscle mass has a significant impact on the level of creatinine in your serum. Due to their lower levels of muscle mass, women often have lower levels of creatinine than men. Children's creatinine levels are also lower than adults'. Men should have serum creatinine levels between 0.6 mg/dL and 1.2 mg/dL, while women should have levels between 0.5 mg/dL and 1.1 mg/dL. Your muscles start to shrink as you age, which causes your serum creatinine normal range to drop. Visit us: https://redcliffelabs.com/myhealth/hindi/blood-test-in-hindi/serum-creatinine-normal-range/