Table 5.

Means ± SD for blood serum metabolites¹ during and after the treatment period².

	Control (n = 5)				CLA (n = 5)
	1 - 28 DIM		29 - 56 DIM		1 - 28 DIM		29 - 56 DIM
Variable	mean	SD	mean	SD	mean	SD	mean	SD
TB3, μmol/L	7.01	4.52	3.58	0.74	4.51	0.73	3.10	0.70
Glucose, mmol/L	3.40	0.11	3.53	0.06	3.47	0.28	3.53	0.19
NEFA4, μmol/L	483	174	165	105	378	119	152	61.1
BHB5, mmol/L	0.54	0.14	0.22	0.08	0.49	0.28	0.39	0.04

¹Jugular blood samples were collected at week 0, 1, 2, 4, 6, 8. Values from week 0, 1, 2, 4 were calculated for 1 - 28 DIM, values from week 6 and 8 were calculated for 29 - 56 DIM.

²CLA supplemented timeframe: d 1 until d 28 of lactation; five primiparous cows received a special supplement including rumen-protected CLA (10 g c9,t11-CLA/day and t10,c12-CLA/day).

³total bilirubin.

⁴non-esterified fatty acids.

⁵betahydroxybutyrate.