Sitosterol analysis in plasma using Gas Chromatography-Mass Spectrometry (GC-MS) is an advanced test designed to accurately measure sitosterol levels in the blood. Sitosterol is a lipid compound found in plants and is considered an important component of plant-based fats. This analysis is used to evaluate lipid disorders such as hypercholesterolemia, as well as to monitor cardiovascular risk. Elevated sitosterol levels may indicate problems with fat absorption or genetic disorders such as sitosterolemia. A plasma sample is collected and analyzed using advanced GC-MS techniques, allowing for highly precise detection of sitosterol. This test is an important tool for physicians to understand the body’s lipid balance and to guide appropriate treatment plans aimed at improving patient health.