Nestlé PRE NAN Low Birth Weight Infant Milk Formula 400g (For premature baby (born before 37 weeks / Low birth weight (less than 2.5 kg))

I have always fed NAN to my chidren. My first was pre term with low birth weight but at that time this product was not around, hence had to struggle to increase his weight, but with my low birth weight, vpre term new baby, I dint have a problem at all. I fed her pre nan for the first 6 weeks and her weight gain has been great. My paed has also suggested the same.I am thinking of moving back to pre nan as my baby has gas and bowel problems since I started nan 1