Place the Vitabite, butter, marshmallow fluff, and water into a small saucepan.
Place over a gentle heat and stir well. Keep stirring until the mixture is a smooth texture. Leave to cool.
Add the vanilla extract to the ProZero ‘double cream’ and whip until firm peaks form.
Gently fold the whipped ProZero ‘double cream’ into the smooth Vitabite mixture. Divide over 3 glasses or bowls and place in the fridge to chill for 3-4 hours.
Serve with permitted fruit.
For freshness, keep covered in the fridge.
ProZero and Vitabite are foods for special medical purposes and must only be used under medical supervision.