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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 = 12	High red meat diet n = 12	Vegetarian diet n = 12
ATNC (μg/kg)	301.6 ± 48.3	1279.5 ± 238.9^a	349.6 ± 46.8^b
ATNC (μg/day)	42.1 ± 5.3	190.1 ± 21.6^e	63.3 ± 5.3^b
Nitrite (μg/kg)	221.3 ± 37.0	578.0 ± 104.1^h	300.7 ± 69.6
Nitrite (μg/day)	39.7 ± 8.5	90.1 ± 15.0	70.0 ± 24.6
B. Protocol 2
	Low red meat diet n = 9	Haem supplement n = 9	Inorganic iron supplement n = 6
ATNC (μg/kg)	766.4 ± 232.6	1438.0 ± 344.8^c	852.3 ± 392.9^d
ATNC (μg/day)	77.5 ± 9.0	156.8 ± 22.7^f	60.7 ± 9.5^g
Nitrite (μg/kg)	267.6 ± 31.3	712.4 ± 161.9	388.8 ± 116.2
Nitrite (μg/day)	33.5 ± 4.2	94.9 ± 29.7	43.4 ± 19.5

A. Protocol 1
	Low red meat diet n = 12	High red meat diet n = 12	Vegetarian diet n = 12
ATNC (μg/kg)	301.6 ± 48.3	1279.5 ± 238.9^a	349.6 ± 46.8^b
ATNC (μg/day)	42.1 ± 5.3	190.1 ± 21.6^e	63.3 ± 5.3^b
Nitrite (μg/kg)	221.3 ± 37.0	578.0 ± 104.1^h	300.7 ± 69.6
Nitrite (μg/day)	39.7 ± 8.5	90.1 ± 15.0	70.0 ± 24.6
B. Protocol 2
	Low red meat diet n = 9	Haem supplement n = 9	Inorganic iron supplement n = 6
ATNC (μg/kg)	766.4 ± 232.6	1438.0 ± 344.8^c	852.3 ± 392.9^d
ATNC (μg/day)	77.5 ± 9.0	156.8 ± 22.7^f	60.7 ± 9.5^g
Nitrite (μg/kg)	267.6 ± 31.3	712.4 ± 161.9	388.8 ± 116.2
Nitrite (μg/day)	33.5 ± 4.2	94.9 ± 29.7	43.4 ± 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.