Beta glucan is a polysaccharide that is becoming increasingly popular in cosmetics due to its unique skin care properties. Its natural origin and beneficial effects on the skin make it a popular choice in skin care products. The aim of this article is to present the uses and benefits of beta glucan in cosmetics, based on available scientific research. beta glucan - Origin and Properties Beta-glucan is a polysaccharide that occurs naturally in many organisms, including the cell walls of yeast (e.g. Saccharomyces cerevisiae ), cereals (such as oats – Avena sativa and barley – Hordeum vulgare ), and mushrooms (including reishi – Ganoderma lucidum , shiitake – Lentinula edodes , and maitake – Grifola frondosa ). Due to its diverse origins, beta-glucan may exhibit different chemical and biological properties. Its structure and biological activity depend on the length of the polysaccharide chain and the type of glycosidic bonds. Beta-glucans of fungal and yeast origin usually have β-(1→3) and β-(1→6) bonds, while beta-glucans from cereals are mainly characterized by β-(1→3) and β-(1→4) bonds. Beta-glucan has a wide range of biological properties that make it a popular ingredient in dietary supplements, cosmetics, and pharmaceuticals. The most important properties of beta-glucan are described below. Moisturizing properties Beta glucan has the ability to bind water, which leads to increased hydration of the upper layers of the skin. As a result, the skin becomes more elastic, soft and less prone to drying out. These properties make beta glucan a particularly valuable ingredient in cosmetics intended for the care of dry and sensitive skin. Antioxidant Beta glucan acts as an antioxidant, neutralizing free radicals and protecting cells from oxidative stress. Free radicals are one of the main causes of skin aging and the development of chronic diseases. Regular use of beta glucan can help protect skin cells from damage and slow down the aging process. Anti-inflammatory Beta-glucan has a strong anti-inflammatory effect, making it an ideal ingredient for people with sensitive skin, prone to irritation and inflammation, such as atopic dermatitis (AD) or psoriasis. Thanks to its soothing properties, it can be used in cosmetic and medicinal products aimed at reducing inflammation and irritation. Immunostimulating Beta-glucan is known for its effect on the immune system. It supports the activation of macrophages, neutrophils and NK (natural killer) cells, which play a key role in fighting infections and in the body's regenerative processes. Its immunomodulatory effect makes beta-glucan widely used in dietary supplements and preparations supporting immunity. Prebiotic Properties Beta-glucan from cereals has a prebiotic effect, meaning it feeds beneficial gut bacteria such as Lactobacillus and Bifidobacterium . Consuming it can support digestive health by improving the balance of gut microflora and aiding digestion. Supporting Glucose Control Beta glucan, which is present in oats and barley, has the ability to slow down the absorption of glucose in the digestive tract, which can help stabilize blood sugar levels. This is why it is recommended for people with insulin resistance and type 2 diabetes as part of a diet that helps regulate glycemia. Lowering Cholesterol Levels Scientific studies indicate that beta-glucan from cereals, especially oats, can reduce LDL cholesterol ("bad" cholesterol) by limiting its absorption in the intestines. Regular consumption of beta-glucan may contribute to reducing the risk of cardiovascular disease. Beta glucan is a multifunctional polysaccharide with a wide range of beneficial properties. Depending on the source, it can have moisturizing, antioxidant, anti-inflammatory, immunostimulating, prebiotic and blood sugar and cholesterol control effects. Due to these properties, beta glucan is used in cosmetics, dietary supplements and pharmaceuticals, and its regular use can support health and well-being. Application in Cosmetics Beta-glucan is widely used in cosmetics, both in skin and hair care. Beta-glucan is widely used in cosmetics, both in skin and hair care. Skin care Moisturizing : Beta-glucan attracts water to the upper layers of the skin, which increases its hydration and elasticity. Studies have shown that using products with beta-glucan can significantly improve the skin's moisture levels. Protection : Creates a protective film on the skin surface, protecting it from harmful UV radiation and environmental pollution. Regeneration : Stimulates the synthesis of collagen and elastin, which helps improve skin elasticity and firmness. Studies suggest that beta-glucan can support wound healing processes. Hair care Beta-glucan is also used in hair care products. It helps repair damage, increases hair strength and adds shine. Thanks to its moisturizing properties, beta-glucan can help fight dry and brittle hair. Beta-Glucan Advantages and Disadvantages Advantages Natural origin – beta-glucan is an ingredient of plant or fungal origin, which makes it attractive to people who prefer natural cosmetics and supplements. Multi-faceted action – its moisturizing, antioxidant and immunostimulating properties make it a versatile ingredient in cosmetics and health products. Safety of use – numerous studies confirm that beta-glucan is well tolerated by the skin and body, which makes it safe for long-term use. Defects Production cost – obtaining and purifying beta-glucan can be expensive, which affects the price of the final products. Stability in cosmetic formulations – In some formulations, beta-glucan may require special stabilization technologies to maintain its effectiveness. According to research conducted by Cosmetic Ingredient Review (CIR), beta-glucan has been recognized as a safe cosmetic ingredient. Its use is not associated with health risks. Beta-glucan has no significant disadvantages. It is generally considered a safe cosmetic ingredient. However, it is important to remember that individual intolerance or allergic reactions may occur in some people. Contraindications and Safety Beta-glucan is generally considered a safe cosmetic ingredient. There are no significant contraindications to its use. However, people with hypersensitivity to plant-based ingredients should exercise caution. In summary, beta-glucan is an effective and safe cosmetic ingredient with numerous benefits for skin and hair care. Its moisturizing, regenerating and anti-inflammatory properties make it an ideal choice for those looking for natural cosmetic solutions.