Albumin

Albumin, also known as serum albumin, is the most abundant protein in human blood plasma. It is primarily synthesized in the liver and plays a crucial role in maintaining oncotic pressure, which is essential for the distribution of body fluids between body compartments. Albumin also serves as a carrier protein for hormones, vitamins, and drugs, and acts as a major antioxidant in the extracellular space. Clinically, albumin levels are indicative of liver function, nutritional status, and systemic inflammation. Hypoalbuminemia, or low serum albumin levels, can reflect conditions such as liver disease, kidney disease, malnutrition, and chronic inflammation. It is associated with poor outcomes in critically ill patients and may predict cardiovascular events and cognitive impairment. For athletes and biohackers, maintaining optimal albumin levels is important for recovery and overall health, as it influences fluid balance and nutrient transport. However, albumin levels can be affected by various factors, including hydration status, acute illness, and protein intake. Researchers found that albumin infusion does not necessarily improve outcomes in hypoalbuminemic patients, suggesting that addressing underlying causes of inflammation is more effective. Time-of-day and fasting status do not significantly affect albumin levels, but acute illness and hydration status can confound results. Therefore, interpreting albumin levels requires consideration of the clinical context and potential confounding factors.