What is a lactic acid test?This test measures the level of lactic acid, also known as lactate, in your blood. Lactic acid is a substance made by muscle tissue and by red blood cells, which carry oxygen from your lungs to other parts of your body. Normally, the level of lactic acid in the blood is low. Lactic acid levels rise when oxygen levels decrease. Low oxygen levels may be caused by:Strenuous exerciseHeart failureSevere infectionShock, a dangerous condition that limits blood flow to your organs and tissuesIf lactic acid levels get too high, it can lead to a life-threatening condition known as lactic acidosis. A lactic acid test can help diagnose lactic acidosis before it causes serious complications.Other names: lactate test, lactic acid: plasma
