A chemically defined media is one where all of the chemical components of the media are known and defined, such as EZ medium. 

- All-Purpose Media
- Enriched Media
- Chemically Defined Media
- Complex Media
- Selective Media
- Differential Media

Categories of Nutritional Media

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All-Purpose media support the growth of a multitude of organisms. Some examples are tryptic soy broth (TSB) and nutrient agar. 

All-Purpose Media

Enriched media is a type of specialized media that contains extra nutrients such as growth factors, vitamins to promote the growth of fastidious organisms.

Enriched Media

Chemically Defined Media 

A complex media is a media that contains undetermined and variable components because it is obtained from extracts and digests of yeasts, meat, or plants. Some examples are nutrient broth, tryptic soy broth (TSB), and brain heart infusion.

Complex Media

Selective media target the growth of specific organisms by supplying important nutrients and suppressing the growth of competitive, undesirable organisms. 

Selective Media

Differential media are used to distinguish colonies of different organisms based on the change in color of the media or colony. 

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