Cerium level analysis in hair using an Atomic Absorption Spectrophotometer with both Flame and Graphite Furnace Atomic Absorption (GFA) methods is an advanced laboratory test used to determine the concentration of cerium in hair samples. The analysis is based on measuring the absorption of ultraviolet radiation by atoms in the sample, allowing highly accurate determination of cerium levels. This test is used in various medical and environmental applications, such as assessing exposure to heavy metals, studying metal toxicity, or evaluating mineral balance in the body.