Table 3.

Serum testosterone level (ng/ml) in control and L. tyrosine-treated New Zealand bucks.

	0 day	2 w	4 w	6 w	8 w	10 w
Control	0.250 ± 0.05F	0.470 ± 0.17bE	0.663 ± 0.09bD	0.817 ± 0.09cC	1.143 ± 0.11cB	2.120 ± 0.12cA
One dose	0.266 ± 0.06F	0.833 ± 0.09aE	1.117 ± 0.11aD	1.550 ± 0.17bC	2.190 ± 0.21bB	3.177 ± 0.23bA
Two doses	0.267 ± 0.05F	0.813 ± 0.09aE	1.163 ± 0.11aD	1.970 ± 0.18aC	2.580 ± 0.24aB	3.900 ± 0.36aA

Values are mean ± S.E. W, weeks after treatment. Means with different small letters in the same column are significantly different (P < 0.05). Letters with different capital letters in the same row are significantly different (P < 0.05).