Table 4

Parameter of iron status after intervention with either tricalcium phosphate, vitamin D3 or both
Parameter Supplements Placebo Interventions
4 weeks 8 weeks
Plasma iron concentration [μmol/l] CaP 18.8 (5.4) 18.3 (7.3) 19.5 (6.5)
Vitamin D3 22.3 (5.2) 20.8 (6.8) 20.5 (5.1)
CaP+vitamin D3 18.8 (6.7) 21.5 (5.2) 20.5 (5.5)
Plasma transferrin concentration [g/l] CaP 2.5 (0.4) 2.4 (0.5) 2.5 (0.4)
Vitamin D3 2.7 (0.5) 2.6 (0.5) 2.6 (0.6)
CaP+vitamin D3 2.7 (0.4) 2.7 (0.4) 2.8 (0.6)
Transferrin saturation [%] CaP 31.1 (10.1) 32.3 (16,8) 32.9 (10.9)
Vitamin D3 35.0 (11.2) 24.1 (14.4) 33.6 (9.2)
CaP+vitamin D3 29.1 (13.2) 32.0 (8.7) 31.3 (12.3)
Plasma ferritin [μg/l] CaP 54.1 (28.4)1 47.5 (21.7)1 45.4 (22.6)
Vitamin D3 88.3 (65.1)12 81.0 (60.1)12 72.6 (43.4)
CaP+vitamin D3 134.6 (138.5)2 139.3 (151.3)2 105.0 (99.6)
Faecal iron excretion [mg/d] CaP 8.7 (6.4) 7.7 (4.5) 7.7 (4.0)
Vitamin D3 9.1 (4.0) 9.5 (5.0) 8.3 (3.7)
CaP+vitamin D3 7.4 (2.9) 6.7 (2.4) 7.3 (2.9)

n = 51, except plasma transferrin n = 50; data are expressed as mean (standard deviation); CaP: tricalcium phosphate; 1 2 mean values within a column with dissimilar superscript numbers are significantly different (p ≤ 0.05); results without superscripts in a row/column have no significant differences; effect of time was tested using general linear model with repeated measurements (with pairwise comparisons based on Fishers-LSD test); effect of supplementation was tested using univariate analysis of variance followed by Student-Newman-Keuls post hoc test.

Trautvetter et al.

Trautvetter et al. Nutrition Journal 2014 13:6   doi:10.1186/1475-2891-13-6

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