Who Should Use Each Variant?
Aptamil Gold is intended for healthy, full-term babies (born at or after 37 weeks of gestation) when breastfeeding is not possible or is being supplemented. It can be used from birth.
Aptamil Preterm Formula is designed for babies born before 37 weeks of gestation, or those with low birth weight (typically below 2.5 kg). These infants need higher protein, calcium, phosphorus, and energy per feed. Aptamil preterm formula is almost always started in a hospital neonatal unit under medical supervision. If your baby was discharged on preterm formula, do not switch or continue without guidance from your neonatologist or pediatrician.
Aptamil Newborn Formula suits full-term babies from birth through the earliest months. It falls under the standard first-stage infant milk formula category and is not intended for premature infants.
A full-term, healthy baby does not need preterm formula. Using a higher-protein, higher-calorie formula in a baby who does not require it may place unnecessary load on developing kidneys. Always follow your pediatrician's recommendation on which aptamil formula stages to use and when to transition.
For a broader look at caring for your baby in those early weeks, see newborn care essentials beyond feeding.