The Claim

In a DHT-induced polycystic ovary syndrome (PCOS) mouse model, daily oral administration of 1 × 10⁹ CFU of Bifidobacterium longum BL21 for 8 weeks is associated with increased serum follicle-stimulating hormone (FSH) and estradiol (E2) levels, and decreased testosterone and luteinizing hormone (LH) levels, suggesting a potential role in restoring hormonal balance in this animal model of PCOS.

Source: Modulatory impact of Bifidobacterium longum subsp. longum BL21 on the gut–brain–ovary axis in polycystic ovary syndrome: insights into metabolic regulation, inflammation mitigation, and neuroprotection

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
11score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Correlation
1 study reviewed
In plain English

Giving a specific probiotic to mice with a condition like PCOS helped balance their sex hormones — boosting some and lowering others — after 8 weeks.

See the scientific wording

In DHT-induced PCOS model mice, 8 weeks of daily oral supplementation with 1 × 10⁹ CFU of Bifidobacterium longum BL21 is associated with increased serum levels of follicle-stimulating hormone (FSH) and estradiol (E2), and decreased testosterone and luteinizing hormone (LH), indicating a potential role in restoring hormonal balance in this animal model of PCOS.

What the research says

1 study
  1. Study: Modulatory impact of Bifidobacterium longum subsp. longum BL21 on the gut–brain–ovary axis in polycystic ovary syndrome: insights into metabolic regulation, inflammation mitigation, and neuroprotection

    The study gave a specific probiotic to mice with PCOS for 8 weeks and found it improved key hormones linked to fertility, just like the claim says.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

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