Which daily carbohydrate amount is associated with ketosis?

• A. 30 g/day
• B. 50 g/day
• C. 100 g/day
• D. 150 g/day

Answer: (B)

Ketosis happens when carbohydrate intake is low enough to drop insulin and shift the body's fuel source from glucose to fat, with the liver producing ketone bodies. For many people, this metabolic shift occurs around 50 grams of carbohydrates per day or less. That level typically leads to depleted liver glycogen, a sustained low insulin state, and increased fat breakdown and ketone production. While some individuals may enter ketosis at slightly lower intakes, 50 g/day is a commonly cited threshold that is associated with ketosis for a broad population. Higher daily carbs, like 100 g/day or 150 g/day, usually keep the body in glucose-burning mode and do not sustain ketosis. A lower amount such as 30 g/day can also promote ketosis for some, but the value most commonly linked to ketosis across many people is 50 g/day.