Effects of Lonicera caerulea on serum testosterone levels in Heat stress-treated male mice. Serum Testosterone Level (ng/mL) in control group (C), Honey berry group (HB), Heat shock group (HS), Honey berry + Heat shock group (HB + HS). Compared to the control group, all groups showed similar levels of serum testosterone, they were not significantly affected by thermal shock. There are no significant differences. Values are the mean ± SD of 4 mouse groups. (SPSS, LSD, Dunnett T3, n = 20).