[Reference values for lactate dehydrogenase in the serum during childhood and puberty (author's transl)]

Lactate dehydrogenase activity was measured in the serum of persons between the ages of 1 and 22 years. There was a continuous decrease with age, which occurred in three phases. The most striking was the marked decrease at the age of about 12 years. The normal adult range is reached at about 22 years.