Effects of the low carbohydrate diet and curcumin on (a) testis, (b) epididymis, (c) vas deferens, (d) sperm motility, (e) sperm counts, (f) percentage of normal sperm morphology in male mice. Data are expressed as means ± SD. n = 11–12 per group. Bars (a, b, c, d) with different letters indicate that values are significantly different. (One-way ANOVA, Duncan’s test, p < 0.05). AIN-93M: AIN-93M diet; LC: low carbohydrate diet; LC/AIN-93M: low carbohydrate diet changed to AIN-93M diet; LC/KD: low carbohydrate diet changed to ketogenic diet; LC/KDCu: low carbohydrate diet changed to ketogenic diet and curcumin.