I think so. I started eating less a few days ago and plan on fasting 36 hours once a week.
Discussion
If you have more than 5% body fat fasting for 72 hours is within your reach. You cannot metabolize fat until blood sugar levels are stable at 90-100 for 36 hours to allow blood insulin levels to drop. You can buy blood glucose testers and blood ketone testers for $40 on Amazon to monitor your status and progress.