The d-xylose absorption test is useful in the diagnosis of tropical and idiopathic sprue, 1–4 but results are variable in other disorders and in elderly persons without intestinal disease. 5,6 ...

Biopharmaceuticals, medium- and high-molecular weight biologically active macromolecules, are not easily absorbed by the small intestine, the main organ responsible for gastrointestinal absorption, ...

A rise in the serum level of free folate in man follows the ingestion of conjugated folate purified from yeast. Everted sacs of rat intestine release folate from conjugate, and homogenates of ...

NEW ORLEANS–Optimal lowering of serum low-density lipoprotein (LDL) cholesterol levels requires blocking all its sources. Although statin drugs block its synthesis in the liver, they do not address ...