Lactate dehydrogenase (LDH) is an enzyme present in most body tissues. Normal LDH levels for adults are usually 140–280 units per liter (U/L) in the blood. LDH is involved in cellular respiration, ...
Liver enzymes are proteins in your liver that speed up chemical reactions. If your liver is damaged, blood tests will show abnormally high levels of these enzymes circulating in your bloodstream.