Serum creatinine is the basic index to check whether renal function is normal. There are many reasons for the low creatinine, such as anemia, muscular dystrophy, muscular atrophy, and decreased intake of protein.

Many people think that there is nothing wrong with their kidneys when the serum creatinine level is within the normal range, which is wrong. Serum creatinine can not reflect the condition of kidney in time. Therefore, we should pay more attention to protecting the kidneys and review them regularly.

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