The research behind beta glucan extensive and far-reaching. Over 8,500 studies describe beta glucan’s beneficial effects on your health. Here you can find a database of research for all 3 types of beta glucan: oat, yeast and mushroom:

Beta Glucan Studies

β-Glucans, History, and the Present: Immunomodulatory Aspects and Mechanisms of Action, M. Novak & V. Vetvicka, Journal of Immunotoxicology, September 2007
https://www.tandfonline.com/doi/full/10.1080/15476910802019045

Immune modulating effects of β-glucan. E Murphy, J Davis, Martin Carmichael, Current Opinion in Clinical Nutrition and Metabolic Care, November 2010
https://insights.ovid.com/pubmed?pmid=20842027

Clinical and Physiological Perspectives of β-Glucans: The Past, Present, and Future, Khawaja Muhammad Imran Bashir, Jae-Suk Cho, International Journal of Molecular Sciences, September 2017
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5618555/

Alleviation of seasonal allergic symptoms with superfine beta-1,3-glucan: a randomized study, Yamada J, Hamuro J, Hatanaka H, Hamabata K, Kinoshita S, The Journal of Allergy and Clinical Immunology, May 2007
https://www.jacionline.org/article/S0091-6749(07)00369-7/fulltext

Beta-glucan, inositol and digestive enzymes improve quality of life of patients with inflammatory bowel disease and irritable bowel syndrome, Spagnuolo R, Cosco C, Mancina RM, Ruggiero G, Garieri P, Cosco V, Doldo P, European Review for Medical and Pharmacological Sciences, June 2017
https://europepmc.org/abstract/med/28724171

Effect of beta-glucan, inositol and digestive enzymes in GI symptoms of patients with IBS, Ciacci C, Franceschi F, Purchiaroni F, Capone P, Buccelletti F, Iacomini P, Ranaudo A, Andreozzi P, Tondi P, Gentiloni Silveri N, Gasbarrini A, Gasbarrini G, European Review for Medical and Pharmacological Sciences, June 2011
https://europepmc.org/abstract/med/21796867 

Yeast β-Glucan Suppresses the Chronic Inflammation and Improves the Microenvironment in Adipose Tissues of ob/ob Mice, Cao Y, Sun Y, Zou S, Duan B, Sun M, Xu X, Journal of Agriculture and Food Chemistry, January 2018
https://www.ncbi.nlm.nih.gov/pubmed/29285925

Antioxidative and anti-inflammatory effects of high beta-glucan concentration purified aqueous extract from oat in experimental model of LPS-induced chronic enteritis, D.Suchecka, J.P.Harasym, J.Wilczak, M.Gajewska, M.Oczkowski, S.Gudej, K.Błaszczyk, D.Kamola, R.Filip, J.Gromadzka-Ostrowska, Journal of Functional Foods, April 2015
https://www.sciencedirect.com/science/article/pii/S1756464614003983?via%3Dihub

Cholesterol-lowering effects of oat β-glucan, Othman RA, Moghadasian MH, Jones PJ, Nutrition Reviews, June 2011
https://www.ncbi.nlm.nih.gov/pubmed/21631511

Scientific Opinion on the substantiation of a health claim related to oat beta-glucan and lowering blood cholesterol and reduced risk of (coronary) heart disease pursuant to Article 14 of Regulation (EC) No 1924/20061, EFSA (European Food Safety Authority), EFSA Journal 2010
https://efsa.onlinelibrary.wiley.com/doi/pdf/10.2903/j.efsa.2010.1885

FDA Health Claim Regarding Oat Beta Glucan
https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/cfrsearch.cfm?fr=101.81

TLR2- and Dectin 1-associated innate immune response modulates T-cell response to pancreatic β-cell antigen and prevents type 1 diabetes, Karumuthil-Melethil S ,Sofi MH, Gudi R,  Johnson BM, Perez N, Vasu C, Diabetes (American Diabetes Association), April 2015
https://europepmc.org/articles/PMC4375080

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, Annegret Auinger, European Journal of Nutrition, December 2013
https://link.springer.com/article/10.1007/S00394-013-0492-Z

Immune modulating effects of β-glucan. E Murphy, J Davis, Martin Carmichael, Current Opinion in Clinical Nutrition and Metabolic Care, November 2010
https://insights.ovid.com/pubmed?pmid=20842027

Effects of high β-glucan barley on visceral fat obesity in Japanese individuals: A randomized, double-blind study, Aoe S, Ichinose Y, Kohyama N, Komae K, Takahashi A, Abe D, Yoshioka T, Yanagisawa T, Nutrition, October 2017
https://www.ncbi.nlm.nih.gov/pubmed/28870472

Beta glucan: health benefits in obesity and metabolic syndrome, El Khoury D, Cuda C, Luhovyy BL, Anderson GH, Journal of Nutrition and Metabolism, December 2011
https://www.ncbi.nlm.nih.gov/pubmed/22187640

Effects of Purified Saccharomyces cerevisiae (1→3)-β-Glucan on Venous Ulcer Healing, Sarah Dantas Viana Medeiros, Sara Lima Cordeiro, Jéssica Escorel Chaves Cavalcanti, International Journal of Molecular Sciences, July 2012
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3430226/