Based on diet surveys and physical measurements of 5,034 children aged two to six, researchers found that that the 643 kids who drank cow milk alternatives tended to be shorter than their cow milk-drinking counterparts.
The study even went so far as to suggest a dose-dependent response: the more non-cow milk, the shorter the child. At age 3, kids who drank three cups of non-cow milk a day were 1.5 cm shorter than those who drank 3 cups of cow milk per day.
However, the study has several weaknesses. Most notably, it doesn’t account for the children’s overall diet or the height of both parents.