TABLE 2.

Correlations of cow milk NR and nicotinamide concentrations with breed and indicators of milk quality¹

	NR, μmol/L	Nicotinamide, μmol/L
Breed	−0.28	−0.21
Fat, %	−0.14	−0.39
Protein, %	−0.21	−0.13
Lactose, %	0.58*	0.5
Nonfat solids, %	−0.13	−0.07
Total solids, %	−0.08	−0.3
Somatic cell count, ×103 cells/mL	−0.38	−0.52*
Urea nitrogen, mg/dL	0.55*	0.27
S. aureus	−0.57*	0.41
NR, μmol/L		0.58*

¹Spearman correlation coefficients were determined between NAD⁺ precursor vitamins and milk quality and cow breed with data from Supplemental Table 1 (except cow 3) and Supplemental Table 2. *P < 0.05. NR, nicotinamide riboside.