Can I drink water during Glow15 fast hours? Customer Service July 11, 2018 16:54 During your fasting hours you can have water, AutophaTea™ with no added oil (coconut, MCT, etc.) and black coffee. Related articles Can I have water with lemon during my Glow15 fast? If I don't eat meat or dairy, can I still do the Glow15 program? How is Glow15 different from a Ketogenic diet? Which sweetners are okay on Glow15 program? Can I exercise on Glow15 low days? Comments 0 comments Please sign in to leave a comment.