How to Fast for a Long Period of Time

I am super skinny already and underweight my BMI is like 17 something I don't have any fat really as it is. Some people can actually even with that weight they can go for some time seven days or 14 days but it all depends on how you feelHow your body reacts to not eating. Maybe you can do just juice fasting whatever you feel the Lord is leading you yeah. You need to pray for people like us so we can get your invitation if we cannot spend the entire day connecting with God as a result of five day work week.