Fig. 3

ANCOVA for the adjusted (covaried for pre-supplementation values) mean scores of post-supplementation baseline hydroxyproline. Note: Bars are \( \overline{X} \)± Standard Error of the Mean. *High dose (500 mg·d^− 1 of PrimaVie® Shilajit) < low dose (250 mg·d^− 1 of PrimaVie® Shilajit; p = 0.034) and placebo (p = 0.024)