Discussion: All diets can be described using 3 variables.

1 Those that forbid eating one or more primary macronutrients or ingredients. (Including vegetarians and vegans.)
2 Diets that prohibit the consumption of industrialized and processed foods. (Recommend non-genetically modified organic foods.)
3 Food composition and eating schedule.

Note: Each category also has subcategories.

Link: Is there a health necessity for such a large variety of diets?
https://www.sf-healing.com/page/155 (Copy & Paste)