Vitamin D fortification of non–cow's milk beverages is voluntary in North America. The effect of consuming non–cow's milk beverages on serum 25-hydroxyvitamin D levels in children is unclear. We studied the association between non–cow's milk consumption and 25-hydroxyvitamin D levels in healthy preschool-aged children. We also explored whether cow's milk consumption modified this association and analyzed the association between daily non–cow's milk and cow's milk consumption.

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