The Enfamil A.R Lipil Formula has by far been the best formula i have used for my son. My son (7months now) has been using this formula for about 5 months now. When he first came home i breast fed for about 2 weeks and then I stopped and started him on the Enfamil Lipil formula but he used to spit up very frequently. I took him to the doctor to see what the problem was and we found that the Regular Lipil formula was too thin for his stomach to keep down. The doctor had me change to the A.R formula which has added rice starches in it to thicken the formula and it really helped. Once I began using...