A metabolite is any substance produced during metabolism (digestion or other bodily chemical processes).
The term metabolite may also refer to the product that remains after a drug is broken down (metabolized) by the body.
Kumar V, Abbas AK, Aster JC. Cellular responses to stress and toxic insults: Adaptation, injury, and death. In: Kumar V, Abbas AK, Aster JC, eds. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Philadelphia, PA: Elsevier Saunders; 2015:chap 2.