Phytanic Acid Analysis is a test used to measure the levels of phytanic acid in blood or urine. Phytanic acid is a fatty compound derived from dietary sources such as animal products and plants. This test helps diagnose certain metabolic disorders, such as Refsum disease, a rare condition that leads to the accumulation of phytanic acid in the body due to impaired metabolism. A blood or urine sample is collected and analyzed to determine the acid levels, providing important information about metabolic health. The test can also be used to monitor the effectiveness of treatments or dietary changes. It is recommended in specific cases, especially when unexplained symptoms suggest metabolic issues or there is a family history of similar conditions.