{"@context":"https://schema.org","@type":"Class","@id":"https://schema.org/Substance","rdfs:label":"Substance","rdfs:comment":"Any matter of defined composition that has discrete existence, whose origin may be biological, mineral or chemical.","rdfs:subClassOf":[{"@id":"https://schema.org/MedicalEntity"}],"schema:properties":["activeIngredient","maximumIntake"],"schema:subTypes":["DietarySupplement","Drug"]}