Normal Values
Normal results range from 18 to 67 U/ml for individuals over 20 years old. People under 20 years old have higher ACE levels and are not usually tested.

Note: U/ml = units per milliliter

What abnormal results mean
Abnormal results may be indicated by increased levels that are seen in about 75% of patients with sarcoidosis. However, elevated levels may also be seen in several other disorders including:

active histoplasmosis
alcoholic cirrhosis
amyloidosis
asbestosis
berylliosis
diabetes mellitus
Gaucher's disease
Hodgkin's disease
hyperthyroidism
idiopathic pulmonary fibrosis
leprosy
myeloma
primary biliary cirrhosis
pulmonary embolism
scleroderma
silicosis
tuberculosis
A decrease in ACE levels may indicate:
steroid therapy (usually prednisone)
response to therapy for sarcoidosis

Special considerations
Veins and arteries vary in size from one patient to another and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others.