In our quest to identify the most suitable formula options, we focused on cost-effective selections that offer supplementary advantages beyond meeting basic nutritional requirements. Our approach involved extensive consultations with experts and a thorough review of over a dozen scientific sources, including studies, journals, reports, and advancements, to gain insights into formula composition, nutrients, and related components.

It's recognized that both traditional and organic formulas should contain lactose as the exclusive carbohydrate source. Given lactose's natural presence in mammalian milk and its role as the primary energy provider, formulas strive to emulate human milk as closely as feasible. According to infant feeding specialists, opting for formulas with lactose as the sole sugar is preferable. The majority of healthy infants typically tolerate lactose well, and there is scant evidence indicating that reducing lactose or opting for lactose-free formulas alleviates colic symptoms. Hence, formulations marketed as "sensitive" and devoid of lactose were not considered within our assessment.

Our investigation also delved into regulatory frameworks established by the FDA and CDC governing the production and testing of formula within the United States. Furthermore, we meticulously scrutinized the nutrition and ingredient labels of approximately 50 formulas to discern their variances and resemblances.