What does human milk contain that commercial milk or soy milk doesn t?

Human DNA!

WHAT COUNTRY.

Commercial milk in the USA contains growth hormones.

Human milk changes from day one feeding to what it is much later. The detail is too long for this space.

https://en.wikipedia.org/wiki/Breast_milk#Composit...

Simple answer: mostly a set of antibiotics and enzymes that is specific to the health of human children.

Human milk has two or three times as much vitamin C as cow’s milk.

Aside from the wide world of hormones, antibodies, and hastag stuff that I'll let you look up for yourself (there's a huge world of things you get from breast milk that leave you basically f--ked if you don't get it) the human breast contains loads and loads of sugar. Formula has to be made with loads and loads of corn syrup to come anywhere close, which might explain a few things about this world.

For infants, human milk is by far preferable. It is specially designed just for babies.

Baby "formula" is an attempt to adjust cow milk to make it more like human milk. Obviously lots of babies grew up on this, so it's not a bad choice. The alterations required to adjust almond milk and soy milk are more difficult and these products are usually only used if the baby cannot tolerate cow or goat milk, and human milk is not available.

colustrum

Nothing