The Phosphorus (24 Hrs Urinary) test is a diagnostic test used to measure the amount of phosphorus excreted in a person’s urine over a 24-hour period. Phosphorus is an essential mineral that plays a critical role in several bodily processes, including bone and teeth formation, DNA synthesis, and energy production. The test is typically used to evaluate patients with suspected phosphorus-related disorders such as hyperphosphatemia (high phosphorus levels) or hypophosphatemia (low phosphorus levels). A urine sample collected over a 24-hour period provides a more accurate measurement of phosphorus excretion than a single urine sample. The test is generally safe, and there are typically no special preparations needed beforehand. However, patients may be asked to avoid certain foods or medications that can affect phosphorus levels. The test results can provide valuable information for diagnosing and managing phosphorus-related conditions.