Abstract
Estrogen decreasing during menopause can create problems in the cardiovascular organs, brain, urogental tract, and bone. Estrogen replacement therapy (ERT) can be used to increase estrogen levels. However, side-effects including breast cancer may limit their use. Tempe and tofu are natural plat-based foods which contain phytoestrogens. The aim of this research was to compare estrogen serum levels in ovariectomized rats given tempe flour and tofu flour.This research was conducted on female rats, aged 12 months (n = 72 rats). Rats were grouped into 5 groups: tempe flour, tofu flour, estradiol, casein and non-ovariectomized. The intervention was carried out for two months with three observation points; i) in the second week, ii) fifth week and iii) eighth week. Estrogen serum analysis was done by ELISA (Estradiol EIA-2693). The mean and the differences between treatment groups were analysed using one way ANOVA with post hoc polynomial contrasts (LSD).The highest estrogen serum in the second week intervention was found in the estradiol group followed by the tempe flour, tofu flour, non-ovariectomized and casein groups, respectively. The tempe flour group had the highest mean serum estrogen levels in the fifth week, followed by the estradiol group, non-ovariectomized group, tofu group and casein group. At the eighth week of intervention, the highest estrogen serum level was found in the tempe flour group followed by the estradiol group, tofu flour group, non ovariectomy group and casein group. Interventions in the fifth and eighth weeks showed significant differences between groups (p < 0.05). It was concluded that tempe flour rendered twice the serum estrogen level compared to tofu flour. Further research is needed in the form of clinical trials to prove that effect in humans.
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