Table 8. Nitrogen profile in relation to the dietary treatments and sampling time.

Item	Group			SEM	P-value
	C	T1	T2		G	T	G × T
Total proteins (g/l)
D0	51.82	58.33	55.14	1.026	ns	ns	ns
D30	53.33	59.00	56.29	1.030
D60	53.30	58.06	55.20	1.216
D90	53.09	58.54	54.88	1.078
Urea (mmol/l)
D0	7.33	6.55	5.67	0.953	ns	ns	ns
D30	5.40	4.71	3.73	0.513
D60	5.14	5.81	4.72	0.303
D90	5.56	4.53	4.55	0.878
Uric acid (μmol/l)
D0	60.07	68.4	49.37	0.109	ns	ns	ns
D30	51.75	70.19	43.42	0.093
D60	52.94	46.39	55.91	0.181
D90	48.18	41.04	36.28	0.047
Albumins (g/l)
D0	37.7	38.5	35.0	0.086	ns	ns	ns
D30	37.6	39.2	39.6	0.109
D60	35.2	38.7	37.3	0.094
D90	35.2	37.7	39.0	0.103

C = rabbits fed by commercial feed; G = fixed effect of the dietary supplementation; G × T = interaction of the dietary supplementation × time; ns = not significant; T = fixed effect of time; T1 = rabbits fed by feed supplemented with 0.3% of an algae-polyphenolic extract mixture; T2 = rabbits fed by feed supplemented with 0.6% of an algae-polyphenolic extract mixture