Skip to content

Study · Measured the body's own peptide · 2026

1 result

Assessing the Safety and Probiotic Potential of Bifidobacterium longum subsp. infantis BI45: A Comprehensive Study from Genomic Analysis to Randomized Controlled Clinical Trial in Healthy Adults.

Song S, Ding L, Yang S, Liu J, Wang Z, Qin Y, Qin X, Xu F, Zhou F

Probiotics and antimicrobial proteins12 May 2026

PMID42118446 (opens in a new tab)DOI10.1007/s12602-026-11044-4 (opens in a new tab)PepBankPUB-42118446
Publisher pagePubMedAsk about this study
Jump to 1 result

Summary

The text of this summary is not shown here, because the article license does not allow reuse. Read it at the source (opens in a new tab)

Text rights: Publisher copyright. Results still quote short attributed sentences.

Results from this study1

No result from this study comes from a test of the peptide.

Natural levels measured1

These results measure the body's own peptide. Nobody was given the peptide. They are not evidence about taking it. They are left out of key results, evidence counts and charts.

  1. 01HumanEndogenous levelRandomized controlled trialOther

    In healthy adults, Bifidobacterium infantis BI45 supplementation significantly increased serum levels of the body's own LL‑37 versus placebo.

    In plain wordsIn healthy adults, a probiotic raised the body's own LL‑37 level in blood more than placebo did.

    Peptide
    LL-37
    Outcome
    IncreaseSerum LL-37 level
    Study

    n = 48

    Comparator
    Placebo
    Outcome group
    Immune response · Immune and inflammation

    Source sentences

    Summary
    B. infantis BI45 supplementation significantly increased serum levels of immunomodulatory markers Immunoglobulin A (IgA) and antimicrobial peptide LL-37 compared to the placebo (p < 0.05)
    1 context sentence
    Summary · context
    Forty-eight healthy adults were recruited and randomly assigned to receive either B. infantis BI45 or a placebo (n = 24/group) for 8 weeks.

    This result measures the body's own LL-37. Nobody was given the peptide. It is not evidence about taking it.

AI wrote and checked these results. AI can make mistakes, so check important results against the source.

Version history

PepBank keeps every version of the data on this study. Status changes from Retraction Watch, Europe PMC and Crossref are listed with their source.

  1. Version 3Current

    9 Oct 2026, 18:17 UTC

    Study results updated

  2. Version 2

    9 Oct 2026, 03:03 UTC

    Study data updated · source update from Europe PMC

  3. Version 1

    9 Oct 2026, 02:56 UTC

    First added · source update from Europe PMC

Subjects

Terms as the source lists them.

PepBank is a research reference. Talk to a doctor before you use any peptide.