SIOUX FALLS, S.D. (KELO) — Milk is an essential part of the human diet, with it being a great source of calcium, vitamin D, and other nutrients. But when money gets tight, milk can be hard to afford.

Breast milk is the infant’s source of nutrition, but it is also key to establishing a healthy infant gut microbiome. The bacteria in breast milk prevent gut colonization by pathogens and promote the ...