>What is the difference between water and dry fast
By dry, compared with water, fasting, you:
do not consume deuterium via your water consumption (while metabolic water from fat oxidation tends to be deuterium depleted, drinking water can “dilute” it);
might produce more hormones like vasopressin and oxytocin which potentially have healing effects and might make the fast easier;
reach higher blood osmolarity which may have stimulating properties on the immune and detoxification (enzymes) systems.