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Benefits of Beta-Glucans

Evidence:Moderate
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This content is for informational purposes only and does not constitute medical advice. Statements about dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. Individual results may vary — consult your healthcare provider before starting any supplement. Full disclaimer

Evidence-Based Benefits

  • Immune priming — beta-1,3/1,6-glucans bind to Dectin-1 receptors on macrophages and neutrophils, "training" these cells for faster and more effective pathogen recognition and killing — a process now called trained innate immunity
  • Respiratory infection reduction — a clinical trial by Auinger et al. (2013) of 162 adults found that 900mg/day yeast beta-glucan reduced the number of symptomatic cold episodes by 25% and reduced sick days from work by 58% during a 16-week cold season
  • NK cell enhancement — beta-glucans increase natural killer cell activity and numbers, enhancing the body's ability to identify and destroy virus-infected cells and tumor cells
  • Macrophage activation — beta-glucan-primed macrophages show enhanced phagocytosis, oxidative burst capacity, and cytokine production (IL-1, IL-6, TNF-alpha), improving first-line immune defenses
  • Exercise-induced immune suppression — Wellmune yeast beta-glucan has been shown to counteract the temporary immune suppression that occurs after intense exercise, maintaining mucosal immunity in athletes

What the Research Says

Beta-Glucans are a class of polysaccharides derived from yeast, fungi, and other sources, known for their immunomodulatory effects. Yeast beta-glucans specifically interact with innate immune cells via Dectin-1 and CR3 receptors, enhancing immune responses (Auinger et al., 2013). A double-blind, randomized controlled trial (RCT) by Auinger et al. (2013) demonstrated that yeast beta-glucan supplementation significantly reduced cold episodes and sick days in healthy individuals.

Recent studies highlight additional benefits of beta-glucans. A systematic review and meta-analysis by Muroya et al. (2025) found that β-glucans significantly reduced fatigue, increased vigor, and improved mood in healthy individuals compared to placebo. Zhong et al. (2021) reported that yeast β-glucans effectively reduced the incidence, duration, and severity of upper respiratory tract infections in healthy subjects.

Vlassopoulou et al. (2021) conducted a systematic review of 34 RCTs involving 917 participants, concluding that fungal beta-glucans improve immune function, reduce respiratory infections, alleviate allergies, enhance mood, and may aid in cancer therapy without adverse effects. These findings underscore the broad potential benefits of beta-glucan supplementation across various populations.

Overall, beta-glucans demonstrate significant immunomodulatory effects supported by multiple clinical studies, making them a valuable supplement for immune health.

Related Conditions

Immune Function
Full Beta-Glucans Guide

References

  1. RCTAuinger A, Riede L, Bothe G, Busch R, Gruenwald J (2013). Yeast (1,3)-(1,6)-beta-glucan helps to maintain the body's defence against pathogens: a double-blind, randomized, placebo-controlled, multicentric study in healthy subjects. European Journal of Nutrition. DOI PubMed
  2. ReviewNetea MG, Quintin J, van der Meer JW (2011). Trained immunity: a memory for innate host defense. Cell Host & Microbe. DOI PubMed
  3. Meta-analysisMuroya M, Nakada K, Maruo K, Hashimoto K (2025). Effects of β-glucans on fatigue: a systematic review and meta-analysis.. European journal of clinical nutrition. DOI PubMed
  4. Canaan MM, Reis-Canaan JC, Zangerônimo MG, Andrade EF, et al. (2021). Yeast Beta-Glucans Ingestion Does Not Influence Body Weight: A Systematic Review and Meta-Analysis of Pre-Clinical Studies.. Nutrients. DOI PubMed
  5. Meta-analysisZhong K, Liu Z, Lu Y, Xu X (2021). Effects of yeast β-glucans for the prevention and treatment of upper respiratory tract infection in healthy subjects: a systematic review and meta-analysis.. European journal of nutrition. DOI PubMed
  6. Francelino Andrade E, Vieira Lobato R, Vasques Araújo T, Gilberto Zangerônimo M, et al. (2014). Effect of beta-glucans in the control of blood glucose levels of diabetic patients: a systematic review.. Nutricion hospitalaria. DOI PubMed
  7. ReviewVlassopoulou M, Yannakoulia M, Pletsa V, Zervakis GI, et al. (2021). Effects of fungal beta-glucans on health - a systematic review of randomized controlled trials.. Food & function. DOI PubMed
Show 5 more references
  1. Steimbach L, Borgmann AV, Gomar GG, Hoffmann LV, et al. (2021). Fungal beta-glucans as adjuvants for treating cancer patients - A systematic review of clinical trials.. Clinical nutrition (Edinburgh, Scotland). DOI PubMed
  2. Coelho JD, Watanabe PH, Andrade TS, Teixeira RAR, et al. (2025). Beta-glucans supplementation for sows during gestation and lactation.. Animal bioscience. DOI PubMed
  3. Jesenak M, Prokopova E, Bozensky J, Bonaci-Nikolic B, et al. (2025). Novel Chewable Pleuran-Based Supplement Decreases Respiratory Tract Infections in Children: A Randomised Controlled Trial.. Advances in therapy. DOI PubMed
  4. Xiao Y, Xiao Y, Wang X, Li X, et al. (2025). Novel formulated food for the elderly regulates specific gut bacterial taxa and improves host physiology.. Food research international (Ottawa, Ont.). DOI PubMed
  5. Santamarina AB, Filho VN, de Freitas JA, Franco LAM, et al. (2025). Nutraceutical Blends Promote Weight Loss, Inflammation Reduction, and Better Sleep: The Role of Faecalibacterium prausnitzii in Overweight Adults-A Double-Blind Trial.. Molecular nutrition & food research. DOI PubMed