Table 1.

Effect of a 12-week supplementation of CP and CTP on body weight gain, food intake, food efficiency ratio, and organ weight.

	YC	AC	CP	CTP
	Mean ± SE	Mean ± SE	Mean ± SE	Mean ± SE
Initial BW (g)	24.70 ± 0.48 ***	36.50 ± 0.47	35.98 ± 0.64	36.27 ± 0.41
Final BW (g)	30.06 ± 0.50 ***	42.01 ± 0.85	40.47 ± 0.87	40.40 ± 0.87
Total BWG (g)	5.36 ± 0.24	5.52 ± 0.67	4.11 ± 0.63	3.78 ± 0.89
Food Intake (g/day)	3.17 ± 0.08 *	3.50 ± 0.09	3.34 ± 0.06	3.32 ± 0.08
Energy Intake (kcal/day)	12.53 ± 0.32 *	13.82 ± 0.34	13.19 ± 0.25	13.09 ± 0.30
FER	0.04 ± 0.00	0.03 ± 0.00	0.30 ± 0.00	0.03 ± 0.01
Liver (g/100 g BW)	3.16 ± 0.05 **	3.97 ± 0.09	3.23 ± 0.06 &&	3.24 ± 0.06 $$
Kidney (g/100 g BW)	1.00 ± 0.01 **	0.89 ± 0.01	0.97 ± 0.02 &&	1.02 ± 0.04 $$

Data are the mean ± SE. Significant differences between YC versus AC are indicated as follows: * p < 0.05, ** p < 0.01, and *** p < 0.001. Significant differences between CP versus AC are indicated: ^&& p < 0.01. Significant differences between CTP versus AC are indicated: ^$$ p < 0.01. YC, young mice control (12 weeks old, n = 6); AC, aging control (60 weeks old, n = 6); CP, collagen peptide (60 weeks old, n = 6); CTP, collagen tripeptide (60 weeks old, n = 6); BW, body weight; BWG, body weight gain; FER, food efficiency ratio = body weight gain/energy intake per day.