Renilon 7.5 Renilon 7.5 is an energy dense, low electrolyte, ready to drink, milk tasting nutritional supplement for patients who require a low electrolyte and/or fluid restricted diet. Renilon 7.5 contains 2kcal/ml, with added vitamins & minerals & is indicated for patients with kidney / renal disease. Renilon 7.5 is available in 2 flavours: apricot & caramel. Simply choose your desired flavour above. Renilon 7.5 is gluten free.