beta-glucan

Humectant and skin-soothing ingredient with potential antioxidant properties. Beta-Glucan, a polysaccharide, effectively penetrates the epidermis to provide potent hydration by forming a hygroscopic film and binding water, similar to hyaluronic acid. It also functions as a biological response modifier, activating immune cells like macrophages and fibroblasts via specific receptors (e.g., Dectin-1) to promote wound healing, reduce inflammation, stimulate collagen synthesis, and enhance skin barrier function and elasticity.

Beta-Glucan is generally recognized as safe and well-tolerated in cosmetic applications. The CIR Expert Panel has found beta-glucan to be safe for use in cosmetics, noting a low potential for irritation or sensitization.

Look for products with 0.05-2% (most cosmetic formulations use 0.1-1% for active benefits) for clinical efficacy.