Table 1.

Effect of UV irradiation of skin on overall beta-diversity in faecal samples.

Day/Treatment	Group 1	Group 2	t-Value	p-Value
Day 35	D++ UVR+	D++ UVR−	1.24	0.15
	D+ UVR+	D+ UVR−	0.79	0.84
	D− UVR+	D− UVR−	0.89	0.67
	D− UVR+	D+ UVR−	0.86	0.67
Day 63	D++ UVR+	D++ UVR−	1.09	0.30
	D+ UVR+	D+ UVR−	1.03	0.39
	D− UVR+	D− UVR−	0.79	0.84
	D− UVR+	D+ UVR−	0.82	0.79

PERMANOVA was used to calculate the effect of UVR on overall beta-diversity in faecal samples from mice within each vitamin D group. A separate analysis of mice acquiring vitamin D solely through UVR (D−UVR+) versus diet (D+UVR−) is shown in the fourth line of each group. n = 5/group, degrees of freedom (df) = 7–8 in all analyses, and permutations = 126. “t” = t-statistic.