Renastart Renastart is a high energy powdered formula for the dietary management of renal failure in children from birth to 10 years. It is specially formulated with low levels of protein, calcium, chloride, potassium, phosphorus & Vitamin A, containing whey protein, amino acids, carbohydrate, fat, vitamins, minerals, trace elements & the long-chain polyunsaturated fatty acids (LCPs) Arachidonic acid (AA) & Docosahexaenoic acid (DHA). Renastart is a food for special medical purposes.