Nutritional ketosis is achieved through carbohydrate-restricted ketogenic diets, originally 90% fat, with modified versions being 60-70% fat and higher protein.

“So but still it remains that uh the ketogenic diet is the most scientifically researched diet that has an objective biioarker that defines the physiological state of being in the diet and that's beta hydroxybutyrate above 0.5 mill moles per liter.”