Bindy - I put DS onto formula when he was 2.5 days old as I couldn't handle the pain, my BP was sky high and I was stressing out so much it just wasn't a good environment for the bub. Plus, if I had continued, i feel sure that I would have got some sort of depression for it. I felt great relief when I switched to formula and it was the right decision for us. I tried him on Nan ha as that was what the hospital had, and then a few weeks later switched him to s26 gold when he got constipation. He has been fine since then. So no problems here. HTH.