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Saccharomyces cerevisiae

What does the research say about Saccharomyces cerevisiae?

6 health outcomes synthesised

Research on Saccharomyces cerevisiae spans 6 health outcomes, with the strongest evidence base for reduced inflammation (6 studies, predominantly moderate effect sizes) emerging from a small human RCT (n=12) and animal/in vitro models. Doses and forms are inconsistently reported across studies, and no single effective dose range has been established. Most outcomes are supported only by preliminary evidence, primarily in non-human populations.

Strongest evidence: The most studied outcome is reduced inflammation, with 6 of 6 studies reporting beneficial effects, including one small human RCT (n=12) showing significant reductions in microvascular inflammation. Effect sizes are predominantly moderate. No consistent dose range is reported across studies.

Mixed or weaker evidence: Improved immune function (5 studies, all beneficial but effect sizes mixed) and reduced blood pressure (3 studies, moderate effect sizes) are supported only by low-strength evidence, with no human trials for blood pressure and a systematic review (n=640) showing small immune benefits. Improved intestinal barrier function, improved growth performance, and improved total antioxidant status each rely on 3 studies, all in animals or in vitro, with no human data. For total antioxidant status, only 1 of 3 studies reached statistical significance.

Effective dose patterns: No cross-cutting dose insights can be drawn, as the majority of studies did not report specific doses, forms, or durations for any outcome.

Population insights: The only human data come from one small RCT (n=12) for inflammation and a systematic review (n=640) for immune function. All other outcomes are based on animal models (e.g., broiler chickens, aging mice, poultry, swine) or cell-line studies, making generalizability to humans uncertain.

Notable caveats: Across all outcomes, the evidence base is small (3–6 studies per outcome) and rated as low strength. Publication bias is a consistent concern, as null results are less likely to be published. Many individual studies in each outcome did not reach statistical significance, suggesting true effects may be smaller than reported. Critically, no human trials exist for 4 of the 6 outcomes (intestinal barrier function, blood pressure, growth performance, antioxidant status).

Frequently asked

  • What is Saccharomyces cerevisiae good for according to research?
    Research suggests potential benefits for reducing inflammation (6 studies, moderate effect sizes) and improving immune function (5 studies, mixed effect sizes). Preliminary evidence from animal and in vitro studies also indicates possible effects on intestinal barrier function, blood pressure, growth performance, and antioxidant status, but human data are lacking for these outcomes.
  • What dose of Saccharomyces cerevisiae is typically used in studies?
    Most studies do not report consistent doses, forms, or durations. Across all 6 outcomes, effective doses were not extractable from the available literature, and no standard dosing range has been established in research.
  • Who benefits most from Saccharomyces cerevisiae?
    The only human data come from a small RCT (n=12) showing anti-inflammatory effects in healthy adults, and a systematic review (n=640) on immune function in mixed populations. All other outcomes have only been studied in animals (e.g., broiler chickens, aging mice, poultry, swine) or cell lines, so human benefit profiles remain uncertain.
  • Are there caveats or limitations in the research on Saccharomyces cerevisiae?
    Yes. All 6 outcomes are supported by low-strength evidence with small study counts (3–6 studies each). Publication bias is a concern, as null results are less likely to be published. Many individual studies did not reach statistical significance, and 4 of 6 outcomes have no human trials, relying on animal or in vitro data. Conclusions should be considered preliminary.
  • Does Saccharomyces cerevisiae help with reducing inflammation?
    The evidence for reduced inflammation is the strongest among studied outcomes, with 6 of 6 studies showing beneficial effects and moderate effect sizes. One small RCT (n=12) in healthy adults reported significant reductions in microvascular inflammation. However, most studies are in animals or in vitro, and the evidence base is small and preliminary.
  • Does Saccharomyces cerevisiae improve immune function?
    Five of 5 studies report beneficial effects on immune function, but effect sizes are mixed (small to moderate). A systematic review (n=640) showed small benefits in humans, while other studies used animal models. No consistent dose or form was reported, and limitations include potential publication bias and lack of statistical significance in some studies.

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