“Fat soluble vitamins” — nutrients that dissolve in fats or oils but not in water. These vitamins are often found in foods that contain fat, and fat may be necessary for their absorption from the digestive tract into the bloodstream. People who eat very little fat may have difficulty getting enough of the fat-soluble vitamins […]

“Epidemiological study” — a study examining disease occurrence in a human population.

“Epidemiologic study” — a study examining disease occurrence in a human population.

“Enzyme” — a protein that catalyzes a chemical reaction. A substance that increases the speed of a chemical reaction without being changed in the overall process. Enzymes are vitally important to the regulation of the chemistry of cells and organisms.

“Endotoxin” — a toxin produced by certain bacteria and released upon destruction of the bacterial cell.