Lactose is replaced by maltodextrin, to reduce abdominal gas, and also incorporated into these formulas: fructooligosaccharides, beta-palmitate, starch is suppressed and some carry fiber.
(Savino F, Palumeri E, Castagno E, Cresi F, Dalmasso P, Cavallo F, Oggero R. Reduction of crying episodes owing to infantile colic: A randomized controlled study on the efficacy of a new infant formula. Eur J Clin Nutr. 2006 ; 60: 1304-10)