See examples for 'excess substances':

ttps://www.womensinternational.com/connections/liver/Apr 20, 2017 - During Phase I, some hormones or substances are metabolized directly, but .... of water **to facilitate elimination of toxic and excess substances**.

faculty.taftcollege.edu/dsheehy/includes/courses/.../PhysiologyStudentNotes4.pdfAll vertebrates (modern life forms) need O2 for energy metabolism that releases ... If alveoli are non functional in particular area = Physiological Dead. Space. e. ...... (**wastes, excess substances**) from tubule cells and blood capillaries.

www.bbc.co.uk › ... › GCSE › Science › Biology › Nutrition, digestion and excretiontoxic materials; **waste products of metabolism; excess substances from organisms**. Excretion is not the same as egestion - which is the passing out of undigested .



Examples of "unmetabolized substances" ('unmetabolized' is a common term in medicine):

www.encyclopedia.com/science/encyclopedias-almanacs.../infa... levels of **unmetabolized substances** can deposit in the fatty sheaths surrounding nerves, causing damage and resulting in peripheral neuropathy.

https://books.google.com/books?isbn=3642707882
Dieter Platt - 2012 - ‎Medical
Therefore itseems advantageous to use **nearly unmetabolized substances** in patients who needseveral drugs becauseofseveral diseases, i.e., in multimorbid ...

www.ec.gc.ca/ese-ees/default.asp?lang=En&n=975F1572-1Feb 20, 2015 - ... sites and/or release of the **unmetabolized substances** or their metabolites in feces or urine from consumers directly using these substances.