Table 7.

Changes in metabolites explaining variance in vascular function

	Class	β	Standard Error	P Value
Flow-mediated dilation
Nitrite 80 mg/day
DG (28:2)	Glycerolipids	−0.646	0.045	0.044
N,N-dimethyl-l-valine	Amino acids	−0.744	0.103	0.014
LysoPE [18:3(9Z,12Z,15Z)/0:0]	Glycerophospholipids	0.649	0.050	0.042
C19 H50 N11 O13 P S	unknown	−0.810	0.238	0.005
5-Aminoimidazole-4-carboxamide-1-βd-ribofuranosyl 5′-monophosphate	Imidazole ribonucleosides and ribonucleotides	−0.734	0.361	0.016
C35 H62 N O15 P	Unknown	−0.866	0.297	0.001
Nitrite 160 mg/day
l-glutamine	Carboxylic acid and derivatives	−0.771	0.071	0.009
LysoPC (20:5)	Glycerophospholipids	−0.672	0.084	0.033
PC (18:1/18:1)	Glycerophospholipids	−0.680	0.398	0.031
β-Stiffness index
Nitrite 160 mg/day
C34 H53 N6 O2 P	Unknown	0.785	0.167	0.007
PE (30:0)	Glycerophospholipids	0.634	0.592	0.049
Cross-sectional compliance
Nitrite 160 mg/day
C34 H53 N6 O2 P	Unknown	−0.721	0.001	0.019