1. Basic introduction to the fourth-stage milk powder. The fourth-stage milk powder is a formula for babies aged 4-6 months. It mainly provides the baby with protein, fat, carbohydrate and other nutrients to help the baby gradually adapt to solid food. There are many brands of four-stage milk powder on the market, so which brand is better? 2. Brand recommendation 1. Beingmate Beingmate is a well-known maternal and infant brand in China. Its four-stage milk powder uses high-quality imported raw materials and adds a variety of nutrients to meet the needs of baby growth and development. Moreover, this brand of milk powder tastes good and is easy to digest and absorb. 2. Abbott Abbott is an internationally renowned brand.