Requirement for dietary carbohydrate is zero.
Body and brain run best on ketones with a small amount of glucose which is derived intrinsically.
Ketogenic diets are designed to control insulin. You won’t be able to burn any or much stored fat in the presence of high insulin. Dr. Joseph Kraft designed the 4-hr insulin assay and found 75% of adults are diabetic (abnormal insulin response) even if fasting blood sugar is ok.
Chronically high insulin and insulin resistance is associated with most chronic diseases including cancer and heart disease.
Controlling insulin is best using high fat low carb diet along with intermittent fasting. See Drs. Jason Fung, Jeff Volek, Tim Noakes, Dom D’Agostino etc.
Original Atkins was too high in protein (some insulin response) and “bad” fats.
Try these to get started:
Butter makes your pants fall off, Butter Bob Briggs
https://www.youtube.com/watch?v=7sAqy1lnWXo
Fasting and low carb Dr. Jason Fung
https://www.youtube.com/watch?v=tIuj-oMN-Fk
Bkmk for keto diet info