Beta-Glucan

Measured on: barrier recovery, soothing of inflamed skin and wrinkle depth - the barrier_support 7 and anti_aging 6 jobs this row is scored and sold for.

There is a genuine on-contact effect and it is the smaller half of this ingredient: a soluble high-molecular-weight glucan is a water-binding polymer, so a corneometer reading rises as soon as the film is on the skin, and it goes with the next cleanse. That film is not barrier recovery, not calming and not wrinkle depth, which are what this row scores 7 and 6 and what its own summary promises. None of those has been dated. The 8-week wrinkle-height and roughness result in 27 subjects is a supplier-authored conference abstract, not a full trial with a reported visit schedule; the atopic-dermatitis evidence tests beta-glucan-containing emollients against other emollients, so the polysaccharide's own contribution and its onset are both unattributable. Penetration of yeast-derived glucan into the epidermis has been shown in laboratory work, which is a mechanism, not a timeline. Missing specifically: any vehicle-controlled study of beta-glucan alone at 0.2-1% reporting the first visit at which a barrier, soothing or wrinkle endpoint moved. Two further controlled studies exist and still do not date the endpoints this row is scored for: the 2008 placebo controlled trials used a chitin glucan copolymer rather than beta glucan itself and the 2021 split face post laser study tested finished multi ingredient regimens so neither isolates beta glucan or reports when its own effect first appears.

No vehicle-controlled single-ingredient time course located. The 8-week wrinkle claim traces to a conference abstract in Int J Cosmet Sci 2005 (Pillai, Redmond and Roding), described rather than treated as a dateable trial; the atopic-dermatitis literature covers finished beta-glucan emollients. No PMID asserted.