† Despite the ability of infants to synthesize vitamin D through exposure to sunlight,
nutritional rickets occasionally develops in infants even in areas with perennially sunny
climiates. In San Diego, a 1-year-old breast-fed infant presented with classic signs of
nutritional rickets. Unsupplemented breast milk, limited exposure to sunlight, and darkly
pigmented skin were predisposing factors. Because of this occurrence, we conducted a
survey of vitamin supplementation practices among pediatricians in San Diego. Twenty-nine …