Substance

Any matter of defined composition that has discrete existence, whose origin may be biological, mineral or chemical.

Diagram

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Specializations of Substance

Class	Description
Dietary Supplement	A product taken by mouth that contains a dietary ingredient intended to supplement the diet. Dietary ingredients may include vitamins, minerals, herbs or other botanicals, amino acids, and substances such as enzymes, organ tissues, glandulars and metabolites.
Drug	A chemical or biologic substance, used as a medical therapy, that has a physiological effect on an organism. Here the term drug is used interchangeably with the term medicine although clinical knowledge makes a clear difference between them.

Formalization for Substance

Property	Constraint
subClassOf	MedicalEntity