I have been adjusting my workout into the morning to accommodate my fasting which is usually about 16 hours. Other than some butter tea and MCT oil before my workout and plenty of water. I may try to fast longer as it takes a long while before I feel hungry. Some days I can go about 19 hours before my stomach actually begins to grumble. Some people go days and I am not sure I want to try that. I do need me some protein after working out so we'll see.