For a 2-month-old baby weighing 2.2 kg, specialised nutrition is very important to support healthy catch-up growth. While breast milk is the best option, if you need to use formula, a generic specialised low-birth-weight (LBW) formula or premature infant formula is typically recommended. These formulas are enriched with extra calories, protein, and vital minerals to help smaller babies grow. Because your baby's nutritional needs are unique, please consult your paediatrician before starting any formula. They will help choose the right type and guide you on the exact feeding amounts to ensure your baby thrives safely.