What is the saturation concentration of uric acid in the body?

The saturation concentration of uric acid in the human body is influenced by multiple factors, including temperature, pH value, and the presence of uric acid-binding proteins. Generally, the saturation concentration of uric acid in the body varies by gender and individual differences. The upper limit of the normal serum uric acid concentration range for males is 400 μmol/L. When uric acid levels exceed this range, urate crystals may deposit in tissues such as the kidneys and joints, leading to a series of health problems. For females, the upper limit of the normal serum uric acid concentration range is 360 μmol/L, which is slightly lower compared to males. Under normal physiological conditions, the solubility of uric acid in plasma is approximately 420 μmol/L at 37°C. When the uric acid level in the blood exceeds this saturation point, the excess uric acid crystallizes to form urate crystals, which can deposit in joints and soft tissues, causing diseases such as gout and uric acid kidney stones.

However, the saturation concentration of uric acid is not fixed and can vary due to individual differences and environmental factors. Therefore, it is important to maintain a healthy lifestyle, including a balanced diet, moderate exercise, and maintaining an appropriate body weight.