Results of Ca absorption and vitamin D status in 10 healthy young men. The calcium absorption was measured using 47Ca whole body counting in a double-blinded randomised crossover design. In Figure 2A, Ca absorption from the three different Ca sources; cod bones, salmon bones, and control (CaCO3), respectively, is given. In Figure 2B, Ca absorption in each period independent of treatment is given. Vitamin D concentrations in the young men studied, regardless of treatment are given in Figure 2C. All results are mean values ± SEE. * indicate significant differences.