Yeast Beta-Glucan

Yeast beta-glucan is a polysaccharide—a type of carbohydrate—extracted from yeast cell walls. It occurs naturally in cereals, mushrooms and other fungi as well. In skincare formulations, it functions as a film-forming agent and skin conditioner, helping to create a protective layer on the skin's surface whilst also affecting the thickness and consistency of products.As a ingredient, beta-glucan has been studied for its potential to support skin health through multiple pathways, though research in cosmetic applications remains emerging.

Beta-glucan works primarily through two mechanisms. First, it forms a thin, breathable film on the skin's surface that helps reduce transepidermal water loss, supporting hydration. Second, its polysaccharide structure allows it to interact with the skin in ways that may trigger mild soothing and protective responses.The ingredient also influences product texture and stability, which is why it appears in formulations as a viscosity controller—affecting how a product feels and performs on application.

Yeast beta-glucan is typically incorporated into serums, moisturisers and hydrating treatments. As it works best when supported by a complete skincare routine, pair formulations containing this ingredient with a cleanser, broad-spectrum SPF and other targeted treatments suited to your skin's needs. It is generally well-tolerated across skin types and can be used daily.

Yeast beta-glucan is generally considered safe and well-tolerated in skincare. Those with yeast sensitivity should patch test first, though sensitivities are uncommon.