Subject N001's baseline biomarkers with intermittent fasting and fitness regimen. In a 12-day period (2023 July 11–22), subject N001 underwent IF and consistent fitness regimen in the morning. Ketosis was only achieved on July 16, after 5 days of consistent IF, and fitness and dietary regimens. Glucose and ketone levels were measured using a CGM and a finger sticking device in July 2023, respectively. Data can be found in Dataset S1 and Fig. S3.