The time it takes to enter ketosis varies from person to person, but here’s a general timeline:
Fasting Ketosis: If you fast or significantly reduce carb intake, your body will start producing ketones within 24-48 hours. During fasting, liver glycogen (stored glucose) gets depleted, triggering ketone production.
Low-Carb Diet: On a low-carb diet (such as keto), it typically takes 2-4 days to enter ketosis. During this period, your body adjusts to using fat for fuel instead of carbs.
Strict Keto Diet: For strict keto (usually less than 20-50 grams of carbs per day), it may take 3-7 days to achieve stable ketosis. Some people might need up to 2 weeks.
Testing Ketosis: You can measure ketosis using urine strips, blood ketone meters, or breath analyzers. Keep in mind that individual responses vary, so be patient and consistent with your diet.