Table 1

Mean (±SE) faecal ATNC (μg/kg or μg/day) as NNO and nitrite for the two dietary protocols

A. Protocol 1
Low red meat diet n = 12High red meat diet n = 12Vegetarian diet n = 12
ATNC (μg/kg)301.6 ± 48.31279.5 ± 238.9a349.6 ± 46.8b
ATNC (μg/day)42.1 ± 5.3190.1 ± 21.6e63.3 ± 5.3b
Nitrite (μg/kg)221.3 ± 37.0578.0 ± 104.1h300.7 ± 69.6
Nitrite (μg/day)39.7 ± 8.590.1 ± 15.070.0 ± 24.6
B. Protocol 2
Low red meat diet n = 9Haem supplement n = 9Inorganic iron supplement n = 6
ATNC (μg/kg)766.4 ± 232.61438.0 ± 344.8c852.3 ± 392.9d
ATNC (μg/day)77.5 ± 9.0156.8 ± 22.7f60.7 ± 9.5g
Nitrite (μg/kg)267.6 ± 31.3712.4 ± 161.9388.8 ± 116.2
Nitrite (μg/day)33.5 ± 4.294.9 ± 29.743.4 ± 19.5
  • a P = 0.001 low versus high red meat diet.

  • b P < 0.001 vegetarian versus high meat diet.

  • c P = 0.006 low meat versus haem diet.

  • d P = 0.004 inorganic iron versus haem diet.

  • e P < 0.0001 low versus high red meat diet.

  • f P = 0.004 low meat versus haem diet.

  • g P = 0.001 inorganic iron versus haem diet.

  • h P = 0.007 low versus high red meat diet.