Table 2.

Sterol concentrations in the rat serum

Serum	Units	12 months		24 months
		AL	DR	AL	DR
Sterols
Cholesterol	mg/dl	90.59 ± 8.85	72.36 ± 3.73	112.82 ± 17.51	97.32 ± 3.66
Lanosterol	μg/dl	10.30 ± 0.98	6.76 ± 0.25*	8.44 ± 1.32	6.59 ± 0.21
Lathosterol	mg/dl	0.086 ± 0.011	0.042 ± 0.002*	0.077 ± 0.015	0.051 ± 0.005*
Desmosterol	mg/dl	0.100 ± 0.007	0.130 ± 0.019	0.124 ± 0.026	0.343 ± 0.050*
24S-hydroxycholesterol	ng/ml	27.17 ± 2.10	27.10 ± 0.93	31.33 ± 3.52	28.44 ± 0.99
Phytosterols
Sitosterol	mg/dl	4.65 ± 0.42	1.94 ± 0.31*	3.94 ± 0.54	1.04 ± 0.14*
Campesterol	mg/dl	3.88 ± 0.34	1.77 ± 0.23*	2.96 ± 0.36	1.05 ± 0.13*
Stigmasterol	μg/dl	38.26 ± 2.77	22.08 ± 3.38*	33.19 ± 1.48	12.9 ± 1.57*

Data represent the mean ± SEM (five rats per group)

*P < 0.05 vs. the age-matched control