keto

This term is a colloquial clipping of ketogenic. It is primarily used in casual conversation, health blogs, and social media contexts. While the full term ketogenic is preferred in medical or scientific literature, keto is the standard shorthand for the lifestyle and dietary practice.

As a noun, it refers to the diet itself and is treated as an uncountable mass noun. You do not refer to multiple ketos; instead, you refer to the diet or a keto plan. When used as an adjective, it modifies nouns like diet, lifestyle, or snacks to indicate adherence to the specific nutritional guidelines of ketosis.