Beta-Glucan

Beta glucan works as a humectant the same way hyaluronic acid does, but with an additional mechanism: it penetrates into the epidermis and activates fibroblasts to produce hyaluronic acid endogenously. The result is hydration coming from both a surface film and internal production. In clinical comparisons it reduced transepidermal water loss more effectively than hyaluronic acid.

Some studies report beta glucan can be up to 20% more effective than hyaluronic acid at the same concentration for moisture retention. This matters in compromised or mature skin, where hyaluronic acid applied topically can draw moisture from the dermis rather than delivering it in low humidity conditions.

Beta glucan supports collagen production through macrophage mediated signaling and inhibits the chronic low-grade inflammation (inflammaging) that degrades collagen in aging skin. It has also been studied directly for wrinkle reduction with measurable clinical results.

Beta glucan is classified as a biological response modifier. It activates macrophages at wound sites, which accelerates the clearance of cellular debris and the deposition of new collagen. This is where its medical use originated and where the evidence base is oldest and strongest.

Average wound healing time in clinical evaluations was 10.8 weeks with no adverse events reported across studies. It is increasingly used in post-laser and post-peel recovery protocols in clinical dermatology for this reason.

Beta glucan does not suppress immune activity or stimulate it blindly. It calibrates it. The skin's immune system reads beta glucan as a signal through Dectin-1 receptors on immune cells and responds by modulating inflammatory output. This makes it useful for reactive skin, atopic dermatitis, rosacea and post-procedure inflammation without the risk profile of corticosteroids.

For atopic dermatitis and psoriasis specifically, the first systematic review of beta glucan in dermatology (Food Science and Nutrition 2025) concluded it shows clinical potential given the shared immunopathology with conditions where beta glucan's evidence is already stronger.

Beta glucan has documented antioxidant activity and shows protective effects against UV induced oxidative stress in skin cells. In vitro studies confirm CM-Glucan protects cells against UV exposure. It also inhibits the glycation process that stiffens and ages collagen under chronic sun exposure.