Figure 2.

(a) calcium intake and serum 25(OH)D levels from children with clinically defined rickets (from 17 of 21 children where both pieces of data were available). Dotted lines are at 25(OH)D = 30 nmol/L (taken to indicate likely deficiency), and calcium intake 240 mg/day (taken as a representative lower reference nutrient intake [United Kingdom Department of Health, 1991; Munns et al., 2016]). (b) alkaline phosphatase and parathyroid hormone according to adequacy of calcium intake and serum 25(OH)D. Dotted lines are reference range, bars indicate the mean