This 2020 rodent study investigated yeast cell wall β-glucan effects on bacterial infections:

“β-glucan is a potent inducer of epigenetic and functional reprogramming of innate immune cells, a process called trained immunity, resulting in an enhanced host response against secondary infections. We investigate whether β-glucan exposure confers protection against pulmonary Mycobacterium tuberculosis (Mtb) infection.

• β-glucan induces trained immunity via histone modifications. β-glucan-induced trained immunity confers protection against virulent Mtb via the IL-1 signaling pathway.
• β-glucan-induced trained immunity enhances production of proinflammatory cytokines in human monocytes challenged with heat-killed Mtb. Increase in cytokine production capacity was the result of epigenetic reprogramming and mediated via the PI3K/Akt/mTOR pathway.

Most important, β-glucan-treated mice infected with Mtb demonstrated remarkably enhanced survival, which was dependent on IL-1 signaling.

β-glucan epigenetically reprograms human monocytes, leading to a phenotype characterized by a unique IL-1 signature and anti-mycobacterial properties. β-glucan-treated mice were protected against pulmonary Mtb infection.

While both β-glucan and BCG [Bacillus Calmette-Guerin tuberculosis vaccine] reprogram HSCs to induce trained immunity, BCG reprogramming of HSCs was dependent on IFNγ signaling. β-glucan reprogramming of HSCs was mediated via IL-1 signaling, which was also required for protection against Mtb infection.

Considering safety of β-glucan in a human clinical trial, our results strongly suggest potential clinical implications of β-glucan for both prophylactic and therapeutic use in TB.”

https://www.cell.com/cell-reports/fulltext/S2211-1247(20)30587-8 “β-Glucan Induces Protective Trained Immunity against Mycobacterium tuberculosis Infection: A Key Role for IL-1″

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My comment “many of these findings also apply to yeast cell wall β-glucan treatments” in Long-lasting benefits of a common vaccine lacked clarity. This post provides part of that evidence.

So where do you choose to be? In an 80% survival group who were administered β-glucan before they encountered a serious infection? Or in a < 20% survival group who didn’t take β-glucan?

Which is better for resolving a health situation before it becomes a problem?

• Roll the dice, and hope for luck / providence?
• Do nothing constructive, and depend on interventions after a problem occurs?
• Take responsibility for your own one precious life?