Well, I dont't know which one is best formula milk but when my son was born the hospital fed him mamex gold so I just continue giving him that milk. When my son reached 6 month I use follow-up formula mamil gold. My baby was born small at 2.39kg only at 34 weeks, now he's 6.5month weighing about 8.5kg. Healthy, happy & active boy.. I think every formula is good & made to meet baby necessity, it depends on the individual on the brands they want to use..