My son is 2months old and he is under formula feed. when He was born he was 3.7 kg now he is weighing 4 kg. how to increase my baby weight

A. Hi C 300 g is not even good for one-month-old child so your child has only gain 300 g in two months that absolutely not good maybe the brand of formula you are using right now is also not good enough for the child which advisable for you to consult a lactation doctor and shift to a better brand of formula