Editing Infant formula (section)

===Raw milk formulas===
As physicians became increasingly concerned about the quality of such foods, medical recommendations such as [[Thomas Morgan Rotch]]'s "percentage method" (published in 1890) began to be distributed, and gained widespread popularity by 1907.<ref name = "Schuman"/> These complex formulas recommended that parents mix cow's milk, water, cream, and sugar or honey in specific ratios to achieve the nutritional balance believed to approximate human milk reformulated in such a way as to accommodate the believed digestive capability of the infant.<ref name="Fomon"/>

[[File:Nestlé Food advertisement, 1915.jpg|thumb|A 1915 advertisement for "Nestlé's Food"]]
At the dawn of the 20th century in the United States, most infants were breastfed, although many received some formula feeding as well. Home-made "percentage method" formulas were more commonly used than commercial formulas in both Europe and the United States.<ref name="friedenwald">{{cite book | vauthors = Friedenwald J, Ruhrah J | title = Diet in Health and Disease | publisher = W.B. Saunders Co. | year = 1910 | location = New York | url = https://hearth.library.cornell.edu/cgi/t/text/text-idx?c=hearth;idno=4388698 }}</ref> They were less expensive and were widely believed to be healthier. However, formula-fed babies exhibited more diet-associated medical problems, such as [[scurvy]], [[rickets]] and bacterial infections than breastfed babies. By 1920, the incidence of scurvy and rickets in formula-fed babies had greatly decreased through the addition of [[orange juice]] and [[cod liver oil]] to home-made formulas. Bacterial infections associated with formula remained a problem more prevalent in the United States than in Europe, where milk was usually boiled prior to use in formulas.<ref name="friedenwald"/>