Can I put lemon in my water? 22 February 2022 01:31 Although we suggest no additions to the program, up to 1 wedge of lemon per day is allowed. Related articles Can I chew gum during ProLon®? Is tea, coffee or infusion allowed during ProLon? Is it possible to switch the lunch meal with the dinner meal? Can I have a nutritional support? What if food outside of the ProLon® program were eaten during a day of the diet because of circumstances (e.g., social event)?