NAN A.R. From birthNAN A.R. is a thickened infant formula for formula fed babies with regurgitation. It contains: Starch, to thicken the formula; Partially hydrolysed 100% whey protein, to help facilitate easy digestion; and L.reuteri, a beneficial probiotic which has been shown to reduce regurgitation. NAN A.R. is not suitable for general use and should be used under medical supervision.