On your fasting day, you'll eat a very low
calorie diet plan consisting of things such as vegetables, fruit or fish.
are irrelevant as first and for most you will have to calculate how much energy (kcal) you need in order to build muscle, cut body fat or maintain weight, body composition; you will have to calculate the optimum nutrients balance that your
calories consist of; you will have to distribute the
calories and nutrients at the correct amounts and timings through each day and only then you can think of what supplements are suitable for you to add a relatively small % to your overall precise
diet plan.