Table 3. Effect of S. platensis on testicular cholesterol and plasma testosterone concentrations in experimental HgCl₂-exposed rats as compared to control group.

Groups
Spirulina+HgCl2	HgCl2	Spirulina	Control	Parameters
0.28±0.003**b	0.16±0.002**	0.31±0.01	0.30±0.004	Testicular cholesterol (mg/100 g bw)
2.10±0.15*b	1.49±0.06**	2.68±0.07	2.54±0.08	Plasma testosterone (ng/ml)

Each values represents the mean ± S.E., n = 8. Values marked with an asterisk (*) differ significantly from control value (* P<0.05,** P<0.01), while those marked with a letter differ (b) significantly from HgCl₂ group (* P<0.01).