Fermented soy milk significantly improves lipid profiles and fertility in a model of premenopausal mice, due to increased bioavailability and action of beneficial compounds.
2023 Food Research International Effect of fermented soy beverage in aged female mice model Ruiz de la Bastida A, Langa S, Peirotén , Fernández-Gonzalez R, Sánchez-Jiménez A, Maroto M, et al.
Animal Study Menopause Ovarian Function Soy Milk
In this study, non-fermented soy beverage (SB) and soy beverage fermented with Bifidobacterium pseudocatenulatum INIA P815 (FSB) were tested on both cyclic and acyclic C57BL/6J aged female mice which mimic premenopause and menopause conditions respectively. Over a period of 36 days, the beverages were given to the mice and the variables measured included body weight, lipid and inflammatory profile and fertility. In addition, hepatic gene expressions were examined and the faecal microbiota composition was assessed to further understand the effects of the two beverages.
In the results, FSB displayed a higher concentration of the aglycones daidzein and genistein as well as increased antioxidant activity due to the fermentation process. The cyclic mice that were given FSB experienced a significant rise in the number of oocytes and zygotes retrieved. It was also noticed that the triglycerides were lower in the groups that were given FSB compared to the SB groups. However, it was found that neither of the treatments significantly influenced the inflammatory profile or caused a major shift in intestinal microbiota or hepatic gene expressions in either of the groups. Still, it was observed that FSB had more health benefits than SB with regards to the lipid profile and fertility in the cyclic mice, likely due to the increased bioavailability and bioactivity of compounds due to fermentation.
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