Similac for Supplementation
Perhaps the infant will only receive formula part-time in addition to breastfeeding. In this instance, you might want to look for a supplement-specific formula.
According to Similac, this formula is a "soft introduction" to the formula for breastfeeding babies. Similac for Supplementation contains the OptiGRO blend of DHA, lutein, and vitamin E, all of which are found in breast milk. It also has the most probiotics of any Similac formula on the market.
Similac for Supplementation has received positive feedback from a large number of parents. However, some parents report that this formula caused their children to have loose stools and other digestive disorders, such as flatulence.
Link: https://www.similac.com/products/baby-formula/for-supplementation/23-2oz-4pack.html