Hello Doctor, I am really confused, my son is 7 months old now DOB(23FEB2015) due to low supply of BF I am giving Nan pro since day 1, his weight is 7.9kg, should I switch formula milk from NAN PRO to Similic ? Please also suggest best food to gain weight. Presently, I am giving smash banana with rice, celeriac, rice with carrot, peas and cereal. I heard Similic is better then Nan pro. Regards Chong.