The half-life of prealbumin is several days.

Generally, prealbumin is a plasma protein with a relatively short half-life, typically around 2 days. The details are as follows:

The half-life is a measure of the rate at which a drug or substance is cleared from the body, indicating the time required for the concentration of the substance in the body to reduce by half. For prealbumin, the half-life is relatively short, usually about 2 days, meaning it is metabolized and eliminated from the body relatively quickly. Due to this short half-life, prealbumin can serve as an effective indicator for assessing an individual's nutritional status and protein metabolism. In clinical practice, prealbumin levels are often used to evaluate patients' nutritional condition and monitor the effectiveness of nutritional support therapy.

However, it should be noted that the half-life of prealbumin may vary due to individual differences, age, disease conditions, and other factors. If there are any concerns regarding prealbumin half-life, it is advisable to consult a physician promptly for professional advice.