I dont know much about what formula brand it is and what its claims are, but I assume its due to the inclusion of pro-biotics - of which fast tract would be better, its organic, and made from fruit and vegies and have a range of 13 pro-biotics, not one or two strains. Formula could never reproduce white blood cells that comes with breastmilk to help with immunity though... so yes I would be very wary of claims.