Skip to main content

Table 3 Effect of age and inulin intake and their interaction on intestinal absorption and retention of Ca in rats

From: Dietary inulin intake and age can significantly affect intestinal absorption of calcium and magnesium in rats: a stable isotope approach

  Cont 3 Mo Cont 6 Mo Cont 11 Mo Cont 21 Mo Inulin 3 Mo Inulin 6 Mo Inulin 11 Mo Inulin 21 Mo inulin age interaction
Administered 44 Ca, μg 1637 ± 46 1610 ± 14 1602 ± 17 1605 ± 24 1593 ± 19 1614 ± 19 1621 ± 25 1626 ± 22 NS NS <0.0005
Fecal 44 Ca enrichment, % 12.5 ± 3.3 17.3 ± 2.4 20.2 ± 4.3 18.7 ± 2.8 10.9 ± 4.2 17.8 ± 6.2 17.4 ± 2.1 21.2 ± 3.1 NS <0.0001 NS
Fecal 44 Ca level, μg/g 112 ± 30 182 ± 35 218 ± 45 204 ± 38 76 ± 30 152 ± 49 163 ± 26 188 ± 26 <0.0001 <0.0001 NS
Fecal 44 Ca excretion, μg 856 ± 224 1139 ± 153 1389 ± 96 1366 ± 115 541 ± 223 926 ± 142 1207 ± 195 1192 ± 142 <0.0001 <0.0001 NS
Intestinal 44 Ca absorption, μg 781 ± 206 471 ± 153 213 ± 90 239 ± 117 1052 ± 222 689 ± 142 413 ± 202 434 ± 143 <0.0001 <0.0001 NS
Intestinal 44 Ca absorption, % 47.8 ± 12.9 29.3 ± 9.4 13.3 ± 5.6 14.9 ± 7.3 66.1 ± 13.9 42.7 ± 8.8 25.4 ± 12.4 26.7 ± 8.7 <0.0001 <0.0001 NS
Urinary 44 Ca enrichment, % 17.4 ± 6.5 20.6 ± 6.7 14.8 ± 3.1 16.9 ± 3.9 13.7 ± 3.3 17.5 ± 6.7 18.6 ± 4.2 18.5 ± 4.1 NS NS 0.0569
Urinary 44 Ca excretion, μg 15.3 ± 5.9 14.8 ± 6.0 25.8 ± 10.7 28.1 ± 7.9 23.5 ± 7.2 21.8 ± 9.9 49.0 ± 11.8 40.3 ± 12.5 <0.0001 <0.0001 0.036
44 Ca retention, μg 765 ± 204 456 ± 153 188 ± 92 212 ± 113 1029 ± 219 667 ± 135 364 ± 203 394 ± 145 <0.0001 <0.0001 NS
44 Ca retention, % 46.9 ± 12.8 28.3 ± 9.5 11.7 ± 5.7 13.2 ± 7.1 64.6 ± 13.8 41.3 ± 8.3 22.4 ± 12.4 24.2 ± 8.9 <0.0001 <0.0001 NS
  1. Values are mean ± SD, n = 10 animals.
  2. The rats were given 44Ca after 14 days of inulin intake (7.5%), and fecal non-absorbed 44Ca isotope was determined in a 4d feces and urine pools.