**Note: All laboratory testing requires an authorizing physician. DHA Laboratory offers a patient direct program that partners you with an authorizing physician. If you have any additional questions regarding the availability of testing, please contact our laboratory by telephone or email.**
Evaluate vitamin E deficiency in hemolytic disease in premature infants, and neuromuscular disease in infants (and adults) with chronic cholestasis; evaluate patients on long-term parenteral nutrition; patients with malignancy or malabsorption (eg, patients with cystic fibrosis, cases of intestinal bypass surgery); investigate brown-bowel syndrome.