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? Can I drink coffee during Glow15 fasting hours? Can I use Trehalose? When can I start eating on a Low Day in the Glow15 program? Can I vary my hours of fasting in Glow15? Comments 0 comments Please sign in to leave a comment.