Table 2.

Effects of L-theanine administration on average daily gain and biochemical parameters in serum of rats.

Item	Treatments (mg/kg BW·d)				P value
	0	50	200	400	Linear	Quadratic
Average daily gain, g/d	5.24 ± 0.17b	6.01 ± 0.17a	6.15 ± 0.17a	5.98 ± 0.17a	0.038	<0.01
Glucose, mM	5.65 ± 0.29a	5.31 ± 0.29ab	5.74 ± 0.29a	4.77 ± 0.30b	NS	NS
Insulin, uIU/mL	43.2 ± 2.18a	41.7 ± 2.18a	26.3 ± 2.26b	19.0 ± 3.08c	<0.001	NS
Cholesterol, mM	2.23 ± 0.09	2.08 ± 0.09	2.13 ± 0.09	2.05 ± 0.09	NS	NS
Triglyceride, mM	1.23 ± 0.07	1.21 ± 0.07	1.02 ± 0.07	1.16 ± 0.07	NS	NS
NEFA, mM	1.27 ± 0.13	1.35 ± 0.10	1.45 ± 0.11	1.31 ± 0.10	NS	NS
Urea, mM	5.42 ± 0.16a	4.85 ± 0.16b	5.70 ± 0.16a	5.38 ± 0.17a	NS	NS
LDL, mM	0.339 ± 0.02	0.341 ± 0.02	0.354 ± 0.02	0.347 ± 0.02	NS	NS
HDL, mM	1.74 ± 0.06a	1.52 ± 0.06b	1.60 ± 0.06ab	1.60 ± 0.06ab	NS	NS

BW: body weight, NEFA: non-esterified fatty acids, LDL: low-density lipoprotein, HDL: high-density lipoprotein, and NS: not significant. ^a–c Means within a row not bearing a common superscript letter differ (P < 0.05). Data were reported as mean ± SE. Data of average daily gain were cited by Tong et al. (2016).