Table 2. Pre-injury body weight and food intake of rats fed purified diets for 21 days.

Variables	C	CP	C+
Initial body weight (g)	153±2	152±2	154±2
Pre-injury body weight (g)	320±4	332±4	324±5
Pre-injury body weight gain (g)	166±3b	180±3a	170±3b
Mean food intake (g/d)	23.0±0.3	23.6±0.4	23.6±0.4
Gross weight gain efficiency	0.34±0.00b	0.36±0.00a	0.34±0.00b

C, casein; CP, cod protein; C⁺, casein supplemented with L-arginine, glycine, L-taurine and L-lysine.

Values are mean ± SEM (n = 40 rats/diet).

^{a, b} Values on the same line with the same letter are not significantly different (p≤0.05).

Gross weight gain efficiency is the ratio of gram of body weight gained on gram of food ingested.