In layman term, Gangliosides actually functioning like bridges that connect brain cells, so that signals (messages) can be passed from one cell to another.
So, we need both DHA and Gangliosides (as well as lots of other nutrients), so that they have good brain development and function (i.e. have lots of good and healthy brain cells) and that these brain cells are very well networked/connected. When more brain cells are connected, the faster they learn!
This actually works like nuts and bolts. Two works better than one! I always imagine the DHA, which helps in brain cell development, are like the nuts. Whilst the Gangliosides are like the bolts, which helps in connecting the nuts, tightly fastening them. Both nuts and bolts are very useful, but only when they are used together. Any one part is missing the other becomes useless!
So far, only Anmum Essential has both DHA and Gangliosides uniquely combined in their growing up milk. It is also said that the new formulation has more DHA and more Gangliosides now. There is no other brands that offer these two crucial components in their growing up milk. If you see one, do let me know.