Use Duocal, under medical supervision, for anyone over the age of 1, who needs a versatile energy source for increased energy needs.. Calorically dense – one scoop augments food and beverages by nearly 25 calories.. Powder mixes seamlessly with moist foods and beverages.. Unlike many other energy-boosting formulas, Duocal contains no milk protein.. Can contains 400 grams of unflavored powder..