The kidneys are responsible for keeping the creatinine level in the blood within a normal range. Medical professionals define the typical reference ranges for serum creatinine in micromoles per ...

It has recently been proposed that the true upper normal limit of serum alanine aminotransferase (ALT) is much lower than that listed by the manufacturers of commercially available assays.

Both are called serum proteins ... Under normal circumstances, there is slightly more albumin in your blood than globulin. Although the reference ranges of values—meaning the range between ...